bedmate vs chum

bedmate

noun
  • A person with whom one shares a bed. 

chum

noun
  • The chum salmon 

  • A coarse mould for holding the clay while being worked on a whirler, lathe or manually. 

  • A mixture of (frequently rancid) fish parts and blood, dumped into the water as groundbait to attract predator fish, such as sharks 

verb
  • To cast chum into the water to attract fish. 

  • To accompany. 

  • To share rooms with someone; to live together. 

  • To lodge (somebody) with another person or people. 

  • To make friends; to socialize. 

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