How to fit a gaussian curve over the histogram?

Hello.

I analyzed data derived from LISST-Holo and I want to represent the histogram and gaussian fit. The attached figure indicates histogram of LISST data (Fig. Q_histogram).

I used a 'histfit' function but it was wrong (Fig. Q_gaussian). I do not know that its methods.

Please, I will be looking forward your reply. Thank you.

%% data %%

fraction = [0 0 0 0 0 0 0 0 0 0 0.0168890390136801 0.456004053369363 1.26667792602601 2.04357372065530 1.67201486235433 1.53690255024489 3.25958452964026 3.58047627090019 3.78314473906435 7.38051004897821 7.48184428306030 7.16095254180037 20.0135112312109 21.7361932106063 18.6286100320892 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]

bin_size = [2.71600000000000 3.20500000000000 3.78200000000000 4.46300000000000 5.26700000000000 6.21500000000000 7.33400000000000 8.65500000000000 10.2130000000000 12.0520000000000 14.2220000000000 16.7830000000000 19.8050000000000 23.3720000000000 27.5800000000000 32.5460000000000 38.4070000000000 45.3230000000000 53.4840000000000 63.1150000000000 74.4800000000000 87.8910000000000 103.717000000000 122.394000000000 144.433000000000 170.441000000000 201.132000000000 237.349000000000 280.088000000000 330.523000000000 390.040000000000 460.274000000000 543.155000000000 640.960000000000 756.376000000000 892.576000000000 1053.30100000000 1242.96700000000 1466.78600000000 1730.90800000000 2042.59000000000 2410.39500000000 2844.43100000000 3356.62400000000 3961.04600000000 4674.30500000000 5516 6509.25700000000 7681.36800000000 9064.54000000000]