japer vs pantaloon

japer

noun
  • One who japes; a joker. 

pantaloon

noun
  • An aging buffoon. 

  • Trousers reminiscent of the tight-fitting leggings traditionally worn by a pantaloon. 

  • A kind of fabric. 

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