incompletion vs miscarriage

incompletion

noun
  • The state or quality of not being complete. 

  • A forward pass which is not caught inbounds by the intended receiver. 

  • Something which is not completed. 

miscarriage

noun
  • A failure; a mistake or error. 

  • The spontaneous natural termination of a pregnancy, especially before it is viable; the fatal expulsion of a foetus from the womb before term. 

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