I always use "three times" instead of "thrice".
In manual writing, which is better to put?
Thank you for your message. I really appriciate it!
Thrice is for magic, fairy tales and Harry Potter, not manuals.
Now I'm confused. Which one is "Nay, nay and thrice nay" from?
In Indian English "thrice" is common. Indian English, these days, is a strange mixture of 18th/19th century BrE and modern AmE.
That's funny that you wrote magic spells. That was exactly what I thought of!
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.