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

Example:
What things do you Occasionally do to make your spouse happy?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, glossary, english, language, ESL, ly, zh, adverb, dines, Unabridged Dictionary, Search Boxes, Open Dictionary, Pronunciation Symbols.

Defination from the web:
occasionally from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... occasionally. One entry found. Main Entry: oc·ca·sion·al·ly. Pronunciation: -ˈkāzh-nə-lē, -ˈkā-zhə-nəl-ē Function: adverb. Date: 1630 : ...