discontinuity vs rupture

discontinuity

noun
  • A lack of continuity, regularity or sequence; a break or gap. 

  • a subterranean interface at which seismic velocities change 

  • A point in the range of a function at which it is undefined or discontinuous. 

rupture

noun
  • A burst, split, or break. 

  • A social breach or break, between individuals or groups. 

  • A failure mode in which a tough ductile material pulls apart rather than cracking. 

  • A break or tear in soft tissue, such as a muscle. 

verb
  • To burst, break through, or split, as under pressure. 

  • To dehisce irregularly. 

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