odometer vs slog

odometer

noun
  • A wheel used by surveyors, which registers distance traveled. 

  • An instrument, usually embedded within the speedometer of a vehicle, that measures the distance the vehicle has traveled since production. 

slog

noun
  • A long, tedious walk, or session of work. 

  • An aggressive shot played with little skill. 

verb
  • To strike something with a heavy blow, especially a ball with a bat. 

  • To work slowly and deliberately at a tedious task. 

  • To walk slowly, encountering resistance. 

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