look at vs think straight

look at

verb
  • To consider. 

  • to face (to be presented or confronted with; to have in prospect) 

  • To observe or watch (something). 

  • To study (something) visually. 

think straight

verb
  • To think clearly 

How often have the words look at and think straight occurred in a corpus of books? (source: Google Ngram Viewer )