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

Input: Consider Input: Sentence: 'a woman with short, brown hair is looking into a circular mirror and holding a camera up to her cheek'. Find frequency of the letter 'e'

Output: 4


Input: Consider Input: Sentence: 'a couple of girls are hanging out at a restaurant'. Find frequency of the letter 'l'

Output: 2


Input: Consider Input: Sentence: 'the flowers are in a vase on the table'. Find frequency of the letter 'l'


Output: 2