attest vs disapprove

attest

verb
  • To affirm to be correct, true, or genuine. 

  • To certify in an official capacity. 

  • To put under oath. 

  • To supply or be evidence of. 

  • To certify by signature or oath. 

disapprove

verb
  • To condemn; to consider wrong or inappropriate; used with of. 

  • To have or express an unfavorable opinion. 

  • She disapproves of rap music because of its sometimes aggressive lyrics. 

  • To refuse to approve; reject. 

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