pursuance vs scavenging

pursuance

noun
  • A search for something; a pursuit or quest. 

  • The state of being pursuant; consequence. 

  • A completion or putting into effect of something already begun; a prosecution. 

scavenging

noun
  • The act of searching through refuse for useful material. 

adj
  • That eats carrion 

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