employee vs handler

employee

noun
  • An individual who provides labor to a company or another person. 

  • One way to encourage your employees to work harder is by giving them incentives. 

handler

noun
  • One who handles something (especially manually) or someone. 

  • An advisor or manager to a person occupying a position or office to which the speaker believes the holder does not possess the typical qualifications and/or experience. 

  • A subroutine that handles a particular situation such as an event or exception. 

  • A controller, trainer, someone who handles a specified thing, animal or person (especially a prizefighter). 

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