Unprecedentedly synonyms

It was left untouched by Mahommedanism, and for an unprecedentedly long period kept Europeans at bay without wasting its strength in hostilities.

The hot drought of 1893 extended over the spring and summer months, but there was an abundant rainfall in the autumn; correspondingly there was an unprecedentedly bad yield of corn and hay crops, but a moderately fair yield of the main root crops (turnips and swedes).

In the presidential election of 1896, when an unprecedentedly large vote was cast, the number of voters registered was nearly 20% of the population, and of these nearly 82% actually voted.