bash vs cast a slur on

bash

verb
  • To strike heavily. 

  • To criticize harshly. 

  • To collide; used with into or together. 

noun
  • An attempt at doing something. 

  • A forceful blow or impact. 

  • A large party; a gala event. 

cast a slur on

How often have the words bash and cast a slur on occurred in a corpus of books? (source: Google Ngram Viewer )