butt-fucking vs windpipe

butt-fucking

noun

  • anal sex 

adj

  • Engaging in anal sex 

windpipe

noun

  • The anus. 

  • A section of road or bridleway which has a reputation for having strong crosswinds or localized wind swirls. 

  • Any duct for air or other gas. 

  • The trachea. 

How often have the words butt-fucking and windpipe occurred in a corpus of books? (source: Google Ngram Viewer )