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

Input: Consider Input: Sentence: 'two women standing next to each other holding tennis rackets'. Find frequency of the letter 't'

Output: 7


Input: Consider Input: Sentence: 'a yellow and green train on a train track in a wooded area'. Find frequency of the letter 'o'

Output: 4


Input: Consider Input: Sentence: 'the corner post of a bed that is made up'. Find frequency of the letter 'e'


Output: 4