consistent vs flighty

consistent

noun
  • A kind of penitent who was allowed to assist at prayers, but was not permitted to receive the holy sacraments. 

  • Objects or facts that are coexistent, or in agreement with one another. 

adj
  • Of a regularly occurring, dependable nature. 

  • Of a set of statements: such that no contradiction logically follows from them. 

  • Compatible, accordant. 

flighty

adj
  • That flies easily or often. 

  • Given to unplanned and silly ideas or actions. 

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