dog sleep vs plush

dog sleep

noun

  • A shallow sleep; a pretended sleep. 

plush

noun

  • A textile fabric with a nap or shag on one side, longer and softer than the nap of velvet. 

  • A plush toy. 

adj

  • Having a soft, fluffy exterior. 

  • Very extravagant. 

  • Very expensive, or appearing expensive; opulent, luxurious. 

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