longitudinal vs sideling

longitudinal

adj
  • Forward and/or backward, relative to some defined direction. 

  • Relating to length, or to longitude. 

  • Running in the direction of the long axis of a body. 

  • Sampling data over time rather than merely once. 

noun
  • Any longitudinal piece, as in shipbuilding etc. 

  • A railway sleeper lying parallel with the rail. 

sideling

adj
  • directed toward one side 

  • inclined; having an inclination 

adv
  • in a sidelong direction 

  • obliquely; askew 

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