trainer vs usher

trainer

noun
  • A person who trains another; a coach. 

  • A person responsible for treating injuries sustained by players during matches; a physiotherapist. 

  • A patch for a video game that applies cheats. 

  • A running shoe or sneaker. 

  • A piece of indoor equipment allowing a bicycle to be ridden while stationary. 

usher

noun
  • A person, in a church, cinema etc., who escorts people to their seats. 

  • A male escort at a wedding. 

  • A doorkeeper in a courtroom. 

verb
  • To lead or guide somewhere. 

  • To precede; to act as a forerunner or herald. 

  • To accompany or escort (someone). 

  • To guide people to their seats. 

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