concerning vs knowing

concerning

noun
  • That which one is concerned in; one's business. 

prep
  • Regarding, respecting. 

adj
  • Causing concern; worrying. 

knowing

noun
  • The act or condition of having knowledge. 

adj
  • The ability to know something without being taught. 

  • Suggestive of private knowledge or understanding. 

  • Possessing knowledge or understanding; knowledgeable, intelligent. 

  • Deliberate, wilful. 

  • Shrewd or showing clever awareness; discerning. 

  • Demonstrating knowledge of what is in fashion; stylish, chic. 

prep
  • Given my knowledge about someone or something. 

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