longitudinal vs vertical

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. 

vertical

adj
  • Standing, pointing, or moving straight up or down; parallel to the local direction of gravity; along the direction of a plumb line; perpendicular to something horizontal. 

  • In a three-dimensional co-ordinate system, describing the axis z oriented normal (perpendicular, orthogonal) to the basic plane xy. 

  • Of or pertaining to vertical markets. 

  • In a two-dimensional Cartesian co-ordinate system, describing the axis y oriented normal (perpendicular, at right angles) to the horizontal axis x. 

  • Involving different vintages of the same wine type from the same winery. 

  • Of an interval: having the two notes sound simultaneously. 

noun
  • A vertical market. 

  • An individual slat in a set of vertical blinds. 

  • A vertical geometrical figure; a perpendicular. 

  • A vertical component of a structure. 

  • A vertex or zenith. 

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