necropsy vs sewing

necropsy

noun
  • The pathological examination of a corpse, particularly to determine cause of death. 

verb
  • The act of performing a necropsy. 

sewing

noun
  • Something that is being or has been sewn. 

  • The action of the verb to sew. 

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