quadriceps femoris vs quadriceps of the thigh

quadriceps femoris

noun
  • A group of four thigh muscles, including the rectus femoris, vastus lateralis, vastus intermedius, and vastus medialis muscles. 

quadriceps of the thigh

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