hairbrush vs rub up

hairbrush

verb
  • To spank with a hairbrush. 

noun
  • A brush used in hair care for brushing, tidying, and detangling hair 

rub up

verb
  • To polish or scrub; to cover (something with a substance) by rubbing. 

  • To rub (a body part): to massage, give a massage to. 

  • To assault (someone). 

  • To create (something) by rubbing. 

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