fermata vs pilcrow

fermata

noun
  • The holding of a note or rest for longer than its usual duration; also the notation of such a prolongation, usually represented as a dot with a semi-circle above or below it, written above or below the prolonged note or rest. 

pilcrow

noun
  • Synonym of paragraph mark: ¶. 

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