moment vs perpetually

moment

noun
  • Weight or importance. 

  • A fit; a brief tantrum. 

  • The smallest portion of time; an instant. 

  • A brief, unspecified amount of time. 

  • A quantitative measure of the shape of a set of points. 

  • A petit mal episode; such a spell. 

  • (As in "X moment") An embarrassing event, supposed to be characteristic of some person, group, or situation. 

  • An infinitesimal change in a varying quantity; an increment or decrement. 

  • A definite period of time, specifically one-tenth of a point, or one-fortieth or one-fiftieth of an hour. 

perpetually

adv
  • Seeming to never end; endlessly; constantly. 

How often have the words moment and perpetually occurred in a corpus of books? (source: Google Ngram Viewer )