gagman vs mummer

gagman

noun
  • A writer or performer of gags. 

mummer

noun
  • An actor in a pantomime; one who communicates entirely through gesture and facial expression. 

  • A person who dons a disguising costume, as for a parade or a festival. 

verb
  • Synonym of mum (“to act in pantomime or dumb show”) 

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