1. from time to time - Adverb
2. from time to time - Phrase
sporadically and infrequently
Source: WordNetEducation is an admirable thing. But it is well to remember from time to time that nothing that is worth knowing can be taught. Oscar Wilde
The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. Thomas Jefferson
The surface of American society is covered with a layer of democratic paint, but from time to time one can see the old aristocratic colours breaking through. Alexis de Tocqueville
You never give away your heart; you lend it from time to time. If it were not so, how could we take it back without asking? Jeanette Winterson
Nature is a temple where living columns Let slip from time to time uncertain words; Man finds his way through forests of symbols Which regard him with familiar gazes. Charles Baudelaire
All civilization has from time to time become a thin crust over a volcano of revolution. Havelock Ellis