Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many times did episode 17 originally air?

### Inputs:
table_name: table, columns: ['Episode No. Episode No. refers to the episodes number in the overall series, whereas Series No. refers to the episodes number in this particular series.', 'Series No.', 'Episode', 'Director', 'Writer(s)', 'Original airdate']

### Response:
SELECT COUNT Original airdate FROM table WHERE Episode No. Episode No. refers to the episodes number in the overall series, whereas Series No. refers to the episodes number in this particular series. = 17