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

Q: Sentence: 'a toasted sub sandwich is next to a salad'. Find frequency of the letter 'a'

A: 6
****
Q: Sentence: 'a snowboarder making a jump of a snowy ledge'. Find frequency of the letter 'o'

A: 4
****
Q: Sentence: 'a girl laying on a bed posing for a picture'. Find frequency of the letter 'i'

A:
4
****