levelheadedness vs self-control

levelheadedness

noun

  • The property of being levelheaded, stable, not overly swayed by passion. 

self-control

noun

  • The ability to control one's desires and impulses; willpower. 

verb

  • To control oneself or itself. 

How often have the words levelheadedness and self-control occurred in a corpus of books? (source: Google Ngram Viewer )