dismission vs sacking

dismission

noun
  • Removal from office; termination of employment or services, or position in ones affections. 

  • The act of dismissing or sending away (someone). 

  • The setting aside (of something) from consideration. 

sacking

noun
  • Firing or termination of an employee. 

  • Cheap rough cloth such as would be used to make bags (sacks). 

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