longness vs mileage

longness

noun
  • length, lengthiness 

mileage

noun
  • The total distance travelled in miles or in air miles. 

  • Something worth taking into consideration. 

  • The number of miles travelled by a vehicle on a certain volume of fuel. 

  • An allowance for travel expenses at a specified rate per mile. 

  • The ℕ>0 number of sexual encounters by which a woman’s sexual market value is projected. 

  • The amount of service that something has yielded or may yield in future. 

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