I know you say to someone Bear with me if it is for a few minutes:
bear with me/us - used as a polite way of asking someone to be patient while you do or finish something
- If you just bear with me for a few more minutes, we’ll have all the paperwork finished. (Macmillan)
Can you say
Bear with me for half an hour?
or is that definitely too long?
Edit: Thanks to the comment below, I would like to clarify the situation I am refering to. When you go for an appointment let's say, and the person receiving you is not quite available yet, they tell you "bear with me, please". This is the use I am interested in. I always thought you can only use this expression with a few minutes, but today someone addressed me saying:
Please bear with me half an hour, and then we can speak.
(That person, like me, is not a native speaker, which is why maybe they forgot to say "for half an hour"). I was wondering if you can say that.