Frequency
F= 1/T = T/2π (Hz)
The condition for SHM
The amplitude is constant, the frequency and period are independent of amplitude. And the time dependence of the the displacement is a sinusoid.
Displacement
x(t)=Asin(ωt)
Velocity
v(t)=ωAcos(ωt)
Acceleration
a(t)=-(ω^2)Asin(ωt)
Time period
T=2π*sqrt(m/k)
Angular frequency
ω=2πf=sqrt*(k/m)