স্বাভাৱিক কম্পনাংকস্বাভাৱিক মৃত্যু
স্বাভাৱিক দোলন (Assamese)
1. Natural frequency, measured in terms of eigenfrequency, is the rate at which an oscillatory system tends to oscillate in the absence of disturbance. A foundational example pertains to simple harmonic oscillators... from wikipedia.org