flat tyre vs house slipper

flat tyre

noun
  • The result of stepping on the back of another individual's shoe in an accidental act, or deliberately to bully or tease this person, so as to cause the back of the shoe to collapse under the heel. 

  • A tyre of a motor vehicle that is deflated, especially one deflated because of a puncture when in use. 

house slipper

noun
  • A slipper designed to be worn inside the house 

How often have the words flat tyre and house slipper occurred in a corpus of books? (source: Google Ngram Viewer )