joculator vs trouvère

joculator

trouvère

noun
  • A medieval lyric poet using the Northern langue d’oïl (precursor dialects of modern French), as opposed to their older, southern example, the original troubadours, who used langue d’oc (Occitan) 

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