pup vs woofer

pup

noun
  • Any cute dog, regardless of age. 

  • A young, inexperienced person. 

  • A young dog, wolf, fox, seal, bat or shark, or the young of certain other animals. 

  • A short semi-trailer used jointly with a dolly and another semi-trailer to create a twin trailer. 

  • A new plant growing from a shoot that can be used for propagation. 

  • An early edition of a periodical publication, intended for distribution to distant locations. 

  • A kind of small spotlight. 

verb
  • To give birth to pups. 

woofer

noun
  • A dog. 

  • A loudspeaker that produces low-frequency sound. 

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