overhang vs shelf

overhang

noun
  • That portion of the roof structure that extends beyond the exterior walls of a building. 

  • A fatty roll of pubis flab that hangs over one's genitals; a FUPA. 

  • The volume that tips the balance between the demand and the supply toward demand lagging supply. 

  • Anything that overhangs or protrudes over its base, such as a wave immediately before breaking, or a protruding cliff or rock wall. 

verb
  • To hang over (something). 

  • To impend. 

shelf

noun
  • A projecting ledge that resembles such an object. 

  • A reef, shoal or sandbar. 

  • The part of a repository where shelvesets are stored. 

  • A flat, rigid structure, fixed at right angles to a wall or forming a part of a cabinet, desk etc., and used to support, store or display objects. 

  • The capacity of such an object 

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