frequentative vs reiterative

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. 

reiterative

adj
  • That involves reiteration. 

noun
  • A word signifying repeated action. 

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