Happening or appearing now and then

• off-again

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• on-again

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• periodical

  1. Periodic.
  2. Published at regular intervals of more than one day.
  3. Of or relating to a publication issued at such intervals.

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  1. Periodic.
  2. Published at regular intervals of more than one day.
  3. Of or relating to a publication issued at such intervals.

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• periodic

  1. Having or marked by repeated cycles:
  2. Happening or appearing regularly or from time to time:
  3. Characterized by periodic sentences.

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  1. Having or marked by repeated cycles:
  2. Happening or appearing regularly or from time to time:
  3. Characterized by periodic sentences.

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• occasional

  1. Occurring, encountered, done, or taken from time to time; irregular or infrequent.
  2. Created for a special occasion:
  3. Intended for use as the occasion requires:

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  1. Occurring, encountered, done, or taken from time to time; irregular or infrequent.
  2. Created for a special occasion:
  3. Intended for use as the occasion requires:

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• intermittent

  1. Stopping and starting at intervals.
  2. Alternately containing and empty of water:

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  1. Stopping and starting at intervals.
  2. Alternately containing and empty of water:

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• fitful

  1. Occurring in or characterized by intermittent bursts, as of activity; irregular:

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  1. Occurring in or characterized by intermittent bursts, as of activity; irregular:

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Rarely occurring or appearing

• unusual

  1. Not usual, common, or ordinary.

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  1. Not usual, common, or ordinary.

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• uncommon

  1. Not common; rare.
  2. Wonderful; remarkable.

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  1. Not common; rare.
  2. Wonderful; remarkable.

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• scarce

  1. Insufficient to meet a demand or requirement; short in supply:
  2. Hard to find; absent or rare:
  3. Barely or hardly; scarcely.

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  1. Insufficient to meet a demand or requirement; short in supply:
  2. Hard to find; absent or rare:
  3. Barely or hardly; scarcely.

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• rare

  1. Infrequently occurring; uncommon:
  2. Excellent; extraordinary:
  3. Thin in density; rarefied:

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  1. Infrequently occurring; uncommon:
  2. Excellent; extraordinary:
  3. Thin in density; rarefied:

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• occasional

  1. Occurring, encountered, done, or taken from time to time; irregular or infrequent.
  2. Created for a special occasion:
  3. Intended for use as the occasion requires:

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  1. Occurring, encountered, done, or taken from time to time; irregular or infrequent.
  2. Created for a special occasion:
  3. Intended for use as the occasion requires:

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• infrequent

  1. Not occurring regularly; occasional or rare:
  2. Situated or placed at rather wide intervals, as in time or space:

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  1. Not occurring regularly; occasional or rare:
  2. Situated or placed at rather wide intervals, as in time or space:

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