reorder vs undergo a change

reorder

noun
  • The process of ordering something again. 

verb
  • To order (a product, etc.) again. 

  • To order or command again; to repeat an instruction to. 

  • To place in a new order; to rearrange. 

undergo a change

How often have the words reorder and undergo a change occurred in a corpus of books? (source: Google Ngram Viewer )