Herculean vs muscled

Herculean

adj
  • Of extraordinary might, power, size, etc.; suggesting Hercules in size or strength. 

  • Requiring a huge amount of work; of extraordinary difficulty. 

muscled

adj
  • Having large muscles. 

  • Bearing muscles or muscle tissue. 

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