Adverb
In an occasional manner; on occasion; at times, as convenience requires or opportunity offers; not regularly.
Source: Webster's dictionaryhe was arrogant and occasionally callous Source: Internet
open areas are only occasionally interrupted by clumps of trees Source: Internet
they visit New York on occasion Source: Internet
now and again she would take her favorite book from the shelf and read to us Source: Internet
as we drove along, the beautiful scenery now and then attracted his attention Source: Internet
2000 AD would occasionally take a gamble on non-science fiction material. Source: Internet