How can we print the no. of repetition of each letter in the given word using Python language?

Answer 1

You can do it easily:
'yourwordhere'.count('o')
Will give you 2 as an answer.

Answer 2

s = 0
for letter in word:
if(letter==your_letter):
s+=1

Or:
s = len([None for letter in word if letter==your_letter])