relaxed vs serene

relaxed

adj
  • Free from tension or anxiety; at ease; leisurely. 

  • Without physical tension; in a state of equilibrium. 

  • Made more lenient; less strict; lax. 

  • Of a muscle: soft, not tensed. 

serene

adj
  • Without worry or anxiety; unaffected by disturbance. 

  • Used as part of certain titles, originally to indicate sovereignty or independence. 

  • Calm, peaceful, unruffled. 

verb
  • To make serene. 

noun
  • Serenity; clearness; calmness. 

  • A fine rain from a cloudless sky after sunset. 

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