according to vs no matter what

according to

prep
  • Based on what is said or stated by; on the authority of. 

  • In a manner conforming or corresponding to; in proportion to; in accordance with. , 

  • Depending on. 

no matter what

phrase
  • Regardless, in spite of. 

  • Regardless of any or most possible adverse circumstances. 

How often have the words according to and no matter what occurred in a corpus of books? (source: Google Ngram Viewer )