freshen up vs wash up

freshen up

verb
  • to wash or groom oneself in order to be more attractive 

  • to freshen, make fresh, revivify, make new. 

wash up

verb
  • To wash one's hands and/or face, often around mealtimes. 

  • To clean the utensils, dishes etc. used in preparing and eating a meal. 

  • To carry (an object) to land. 

  • To be carried by water to land. 

  • To arrive in a place; to end up somewhere. 

noun
  • The act by which something is washed. 

  • A meeting to gauge the success or failure of an operation or war game. 

  • Something or somebody that is washed up; a has-been. 

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