jobbing vs part-time

jobbing

adj
  • That does odd jobs; that works on occasional jobs as available. 

noun
  • The fact or practice of using a public office or other position of trust for personal gain. 

  • Buying and selling stocks or goods for profit; mercenary trading. 

  • Work carried out by the job; piecework, odd-job work. 

part-time

adj
  • For, during, or involving less than the normal time for some activity, especially the number of hours an employee works. 

How often have the words jobbing and part-time occurred in a corpus of books? (source: Google Ngram Viewer )