cops vs walloper

cops

noun
  • The connecting crook of a harrow. 

  • The police, considered as a group entity. 

walloper

noun
  • One who wallops. 

  • penis; (by extension) an idiot, a stupid person. 

  • A policeman, a male police officer. 

  • Something big; a whopper. 

  • A cudgel, a shillelagh. 

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