How do I count by frequency of a letter in index in Pyhton : lets say youre giving 5 inputs like so:
hello
hullo
zeros
It is then stored into a list like so ['hello','hullo','zeros']
I would like it to return a dictionary that counts the frequency of the letter in their index.
It should return something like this

{h:2,z:1} {e:2,u:1} {l:2,r:1} {l:2,o:1} {o:2,s:1}
