apply vs employ

apply

verb
  • To put to use; to use or employ for a particular purpose, or in a particular case 

  • To pertain or be relevant to a specified individual or group. 

  • To make use of, declare, or pronounce, as suitable, fitting, or relative 

  • To address; to refer; generally used reflexively. 

  • To lay or place; to put (one thing to another) 

  • To put closely; to join; to engage and employ diligently, or with attention 

  • To submit oneself as a candidate (with the adposition "to" designating the recipient of the submission, and the adposition "for" designating the position). 

employ

verb
  • To use (somebody for a job, or something for a task). 

  • To hire (somebody for work or a job). 

  • To make busy. 

noun
  • The state of being an employee; employment. 

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