commanding vs over one's head

commanding

adj
  • Tending to give commands, authoritarian. 

  • Impressively dominant. 

  • Dominating from above, giving a wide view 

noun
  • The act of giving a command. 

over one's head

adj
  • Directed to someone with authority over the person, so as to avoid requiring the approval of the person himself or herself. 

  • Used other than figuratively or idiomatically: see over, head. 

  • More complex or confusing than one can understand; beyond one’s comprehension. 

  • More than one can handle; too much (especially in over one's head). 

  • Performing at a level greatly superior to one's usual level of performance. 

How often have the words commanding and over one's head occurred in a corpus of books? (source: Google Ngram Viewer )