The hidden saying description

You have to discover the hidden saying.

The number is the frequency of the letter in English expressed in percentage by the natural number closer to its frequency.

First, by selecting one of the numbers in the green zone, this number is replaced by the symbol ?

Then, you must select one letter with the same value between the ones that are below the green area.

When the saying is completed, or before if you prefer it, press the NEXT button to get a new saying.