How to know the place about the specified frequency in a list

I have a such list

list = Uncompress[FromCharacterCode[    Flatten[ImageData[Import["http://i.stack.imgur.com/jTZ0w.png"],"Byte"]]]] 

{95.5049,83.3677,58.1087,31.9574,15.7867,8.69225,7.36413,8.5051,11.8377,18.5031,27.8077,36.2116,40.7328,40.8063,41.1593,41.8588,42.6341,42.4537,40.198,36.0856,31.8759,28.5855,24.3549,19.4213,20.2086,32.1083,54.4969,74.9133,...,7.7973,9.84671,14.9329,23.5806,33.2632,40.0336,42.5976,42.5058,42.0481,42.479,43.432,43.3803,41.0416,37.712,36.5913,35.3856,32.4222,29.3011,25.4246,20.5804,20.3194,30.6338,51.3648,71.5985,72.4108,55.1716}

We can visualize it:

ListLinePlot[list] 

Now we can show the frequency by Fourier in the list

ListLinePlot[Rest[Abs[Fourier[list]]], PlotRange -> All] 

And we can find the specified frequency with max energy the by:

Max[Rest[Abs[Fourier[list]]]]  

117.971

But how to find where it appears in the list? I think these place is what I want to find:

Any method can find it out?