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

Input: Consider Input: Sentence: 'the child is waving a small flag as she stands near two women'. Find frequency of the letter 'g'

Output: 2


Input: Consider Input: Sentence: 'an image of a street sign with a corner restaurant'. Find frequency of the letter 'u'

Output: 1


Input: Consider Input: Sentence: 'a man riding skis down a snow covered ski slope'. Find frequency of the letter 'o'


Output: 4