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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• sporadic

  1. Occurring at irregular intervals or in isolated or scattered places; having no pattern or order:

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  1. Occurring at irregular intervals or in isolated or scattered places; having no pattern or order:

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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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