In this task, you need to count the number of times the given letter appears in the given sentence.

Input: Consider Input: Sentence: 'one woman is arranging the other woman's hair'. Find frequency of the letter 'o'

Output: 4


Input: Consider Input: Sentence: 'a gray airplane with metal petals on the wings takes off from an airport'. Find frequency of the letter 'i'

Output: 4


Input: Consider Input: Sentence: 'a man wearing a tie and sunglasses giving thumbs up with the sun setting behind'. Find frequency of the letter 'l'


Output: 1