depth vs vacancy

depth

noun
  • lowness 

  • the deepest part (usually of a body of water) 

  • the intensity, complexity, strength, seriousness or importance of an emotion, situation, etc. 

  • a very remote part. 

  • the vertical distance below a surface; the degree to which something is deep 

  • the total palette of available colors 

  • a pair of toothed wheels which work together 

  • the property of appearing three-dimensional 

  • the number of simple elements which an abstract conception or notion includes; the comprehension or content 

  • the distance between the front and the back, as the depth of a drawer or closet 

  • the most severe part 

  • the perpendicular distance from the chord to the farthest point of an arched surface 

  • the lower of the two ranks of a value in an ordered set of values 

vacancy

noun
  • Lack of intelligence or understanding. 

  • Empty space. 

  • An available room in a hotel; guest house, etc. 

  • An unoccupied position or job. 

  • A blank mind, unoccupied with thought. 

  • A defect in a crystal caused by the absence of an atom in a lattice 

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