speak highly vs write up

speak highly

verb
  • To praise. 

write up

verb
  • To write about positively; to praise in writing. 

  • Used other than figuratively or idiomatically: see write, up. 

  • To annotate a stamp album page with details about the stamp, such as die used or colour variety. 

  • To document officially the faults, offenses, or wrongdoing of. 

  • To make an upward adjustment in the value of an asset. 

  • To produce by writing. 

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