title: Counting frequency of multiple variables for each key in python dictionary
body: <p>I managed to merge two lists (one representing the key, the other one the values) in a dictionary, in order to further count the frequency of the values. That gives me a  a dictionary with multiples values in a list for each key :
  <img src="https://i.stack.imgur.com/WDfD2.png" alt="enter image description here"></p>
  
  <p>I now want to count, for each key, the total number of DIFFERENT VALUES, for e.g. on my printscreen, for the key 1068, there are 2 different keys (70803, 70805).
  I tried this:
  <img src="https://i.stack.imgur.com/ybQqW.png" alt="enter image description here"></p>
  
  <p>However, it only gives me the TOTAL times the values appears,which is not what I want. 
  As I am a very beginer in that, I have no idea how to proceed (especially with that dictionary with lists inside)</p>
  
  <p>Thanks to all!</p>
  
  <p>Loïc</p>