stillness

noun2

1. •
   The quality or state of being still.

   • The teru-tero (Vanellus cayanensis), is another bird, which often disturbs the stillness of the night. — 1839
2. •
   Habitual silence or quiet; taciturnity.

   • The grauitie, and stillnesse of your youth / The world hath noted. — 1603