I have 5 frequencies and I generated a signal using this 5 frequencies. Now how should I get this frequencies if this frequencies are unknown.

I've attached my code. how to get all the frequencies w_1,w_2,w_3,w_4,w_5 that I used in my code if they are unknown or if I want to tally them. help me in this

[KSSV]

YOu need to check with fft

[rohith bharadwaj]

I've tried using FFT but I am not getting 5 peaks I've attached my codes. in fivelamda.m timeseries is my signal and lkji.m is my FFT code