experiential vs frequentative

experiential

adj
  • Of, related to, encountered in, or derived from experience. 

frequentative

adj
  • Serving to express repetition of an action. 

noun
  • Any of a subclass of imperfective verbs that denote a repeated action, no longer productive in English, but found in e.g. Finnish, Latin, Russian, and Turkish. 

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