This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

ad. Now and then; from time to time.

ad. From time to time; now and then; once in a while; irregularly.

ad. In an occasional manner; on occasion; at times, as convenience requires or opportunity offers; not regularly.

From time to time, as occasion demands or opportunity offers; at irregular intervals; on occasion.

Sometimes; at times.

Casually; accidentally; at random; on some special occasion.

ad. now and then or here and there

"The longer he went on, the more lost I became in the murky waters of his diction, in the fog of my grammatical weaknesses, though all the while I nodded and repeated a word occasionally to make it seem as though his generosity was not falling, like pearls before swine, on the ears of unappreciative foreigners in a blue car with French license plates."

occasion