be in charge of vs see about

be in charge of

see about

verb
  • To take care of; to attend to; to check up on. 

  • To contact (someone); to meet (someone) and talk to them about. 

  • To inform oneself about; to come to know of; to look for. 

How often have the words be in charge of and see about occurred in a corpus of books? (source: Google Ngram Viewer )