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

[Q]: Sentence: 'the two dogs are playing in the pen together'. Find frequency of the letter 'o'
[A]: 3


[Q]: Sentence: 'men standing in the grass with a frisbee'. Find frequency of the letter 'a'
[A]: 3


[Q]: Sentence: 'one player is chased by three opposing players in a women's soccer match'. Find frequency of the letter 'w'
[A]:
1