competent vs fit for purpose

competent

adj
  • Adequate for the purpose. 

  • Resistant to deformation or flow. 

  • Having sufficient skill, knowledge, ability, or qualifications. 

  • Having jurisdiction or authority over a particular issue or question. 

  • Permeable to foreign DNA. 

fit for purpose

adj
  • appropriate, and of a necessary standard, for its intended use. 

How often have the words competent and fit for purpose occurred in a corpus of books? (source: Google Ngram Viewer )