industrial action vs job action

industrial action

noun
  • A workplace protest by employees designed to inconvenience or disrupt the business of the employer. 

job action

noun
  • A workplace protest by employees designed to inconvenience or disrupt the business of the employer, especially one which is limited in duration or severity. 

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