Michael vs Michaelmas

Michael

name
  • An archangel associated with defending the faithful in the tribulation. 

  • A male given name from Hebrew. 

Michaelmas

name
  • A Christian feast celebrated on the 29th of September in honour of the archangel Michael. 

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