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Inset: Probability distributions p$_{ϕ}$ ( ϕ ) for different (relative) oscillation amplitude a$_{os}$/a$_{th}$ . The probability distributions have been calculated for the range of oscillation amplitudes a$_{os}$/a$_{th}$ = 0 − 2. The probability distribution p$_{ϕ}$ ( ϕ ) for a$_{os}$/a$_{th}$ = 0 is flat while that for a$_{os}$/a$_{th}$ = 2 is essentially Gaussian and has the highest peak at ϕ = 0. 

