competent vs impotent

competent

adj
  • Resistant to deformation or flow. 

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

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

  • Adequate for the purpose. 

  • Permeable to foreign DNA. 

impotent

adj
  • lacking physical strength or vigor; weak 

  • incapable of sexual intercourse, often because of an inability to achieve or sustain an erection, having impotentia coeundi 

  • lacking in power, as to act effectively; helpless 

  • sterile 

noun
  • a man who has erectile dysfunction 

  • an impotent or powerless person 

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