Data: Save Statistics

[zhurai]

• [x] Save statistics in other analysis into a separate file
• [x] Have the separate file in a json format
• [x] edit the once/multi/position ones into their own categories (see example in comments for possible format)
• [x] Have the separate file in a cvs format

[zhurai]

possible format for the separate file in json format (adapted from dict with some lists)

{
'length'=number 
'once': [  array/list of all the letters   ]
'multiple': [  array/list of all the letters   ]
'position 1': [  array/list of all the letters   ]
(...)
'position x': [  array/list of all the letters   ]
}

[zhurai]

Disregard JSON proposal. After discussion, it was decided that the statistics were better put into a cvs file instead