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

Input: Consider Input: Sentence: 'the counter of a doctor's office, including a laptop, cotton swabs, and tongue depressors'. Find frequency of the letter 'g'

Output: 2


Input: Consider Input: Sentence: 'a person riding a camel in front of a truck'. Find frequency of the letter 't'

Output: 2


Input: Consider Input: Sentence: 'a white paper plate with a slice of pizza on it'. Find frequency of the letter 'h'


Output: 2