frequentative vs repetitious

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. 

repetitious

adj
  • Characterized by repetition, especially excessive repetition. 

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