Autocomplete results show after enter N(number) character

[jayminchhapia]

We are getting results(suggestion Google Autocomplete) based on user just start writing from first character, can we do auto-suggestion should display when we enter N characters. By default this is not have option/documented to show N number of character user enter after that show the auto-suggestion result.
Can anyone guide / thoughts?
This will be prevent multiple calls to show predictions.