Is Matthew 12:40 Using Common Idiomatic Language?

Whenever the three days and three nights of Matthew 12:40 is brought up in a discussion with 6th day of the week crucifixion advocates, they frequently assert that it is using common Jewish idiomatic language. I wonder if anyone knows of any writing that shows examples from the first century or before regarding a period of time that is said to consist of a specific number of days and/or a specific number of nights where the period of time couldn't have included at least a part of each one of the specific number of days and at least a part of each one of the specific number of nights?

And remember that the purpose of this topic is not to discuss how long the Messiah was in the heart of the earth. There are other topics that do that. However, there are those who say that Matthew 12:40 is using common Jewish idiomatic language such as the Messiah saying that He would be in the heart of the earth for 3 nights when He knew that it would only be for 2 nights. But in order to say that it was common, one would have to know of other instances where the same pattern had to have been used. I am simply looking for some of those instances, scriptural or otherwise.