You’ll find that there’s a gap between what the books say about ATC comms and how things are actually done. No one is being pedantic in an emergency.

If anyone is curious about what the books say, US Air Traffic Controllers use phraseology prescribed by FAA General Order 7110.65.

Also known as the 7110 or the point sixty-five, it includes rules that Air Traffic Controllers must follow to ensure safe and effective operations. So if you're a pilot and are wondering why you have a Hold For Release or are told "unable", you might find the reason in this document.

The Wikipedia article [0] links the PDF version as well as the online version.

[0] https://en.wikipedia.org/wiki/FAA_Order_7110.65

Happy to see a controller here. Thanks for all the clearances. :)

It’s slightly different for marine radio, where it follows the MIRPDANIO mnemonic you might be thinking of that?

3 times is just to "ensure" it gets heard.