rug vs welcome mat

rug

noun
  • A partial covering for a floor. 

  • A dense growth of chest hair. 

  • A (usually thick) piece of fabric used for warmth (especially on a bed); a blanket. 

  • A cloth covering for a horse. 

  • A wig; a hairpiece. 

  • The female pubic hair. 

  • A rough, woolly, or shaggy dog. 

verb
  • To pull roughly or hastily; to plunder; to spoil; to tear. 

  • To cover with a rug. 

welcome mat

noun
  • A doormat with a welcoming message on it. 

  • Any sign or indication of welcome. 

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