look after vs undress with one's eyes

look after

verb
  • To follow with the eyes; to look in the direction of (someone or something departing). 

  • To care for; to keep safe. 

  • To seek out, to look for. 

  • To have as one's business; to manage, be responsible for. 

undress with one's eyes

verb
  • to gaze at someone lasciviously 

How often have the words look after and undress with one's eyes occurred in a corpus of books? (source: Google Ngram Viewer )