Friend vs hot rod

Friend

noun
  • Brand name of a spring-loaded camming device, now used to refer to any such device, often uncapitalized, as friend. 

  • A Quaker; a member of the Society of Friends. (See also Friends.) 

name
  • A surname transferred from the common noun. 

hot rod

noun
  • Typically a passenger vehicle modified to run and/or accelerate faster. The term may be used generically to apply to any car, truck, or motorcycle (et al.) modified for increased speed and/or performance. It may also be used to specifically describe and refer to modified cars from the original (or traditional) era of "hot rods", post World War II and prior to 1960. 

  • The penis. 

verb
  • To modify a vehicle for enhanced driving performance, top speed, and/or to accelerate faster. 

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