Given the task definition and input, reply with output. In this task, you need to count the number of times the given letter appears in the given sentence.

Sentence: 'a surfboard is above a door and under a window'. Find frequency of the letter 'u'

2
Given the task definition and input, reply with output. In this task, you need to count the number of times the given letter appears in the given sentence.

Sentence: 'a surfboard is above a door and under a window'. Find frequency of the letter 'u'

user
2
assistant
Given the task definition and input, reply with output. In this task, you need to count the number of times the given letter appears in the given sentence.

Sentence: 'a surfboard is above a door and under a window'. Find frequency of the letter 'u'

2