in place vs on duty

in place

adj
  • In an original position. 

  • In a proper position. 

  • Established; in operation. 

adv
  • Into a proper or intended position; into place. 

  • New procedures were put in place. 

  • Without changing position. 

  • Into a state of deployment or implementation. 

on duty

prep
  • Actively engaged in an assigned task, duty or occupation. 

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