preg vs up the spout

preg

noun

  • Pregnancy. 

adj

  • Pregnant. 

up the spout

prep

  • broken; not functional or workable; kaput 

  • pregnant 

  • In the chamber, having an ammunition round in a weapon's chamber. 

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