punctuation and voiceover?

So you know that bug wherein voiceover stops speaking at random times? Well, I emailed apple accessibility about it and they told me that it was most likely caused when voiceover hits unanticipated punctuation in whatever content it's reading. The tech support person told me that I might be able to make the bug happen less frequently by changing the punctuation verbosity in voiceover. I know this is possible on a mac, but I've not been able to find this setting on iphone. Does this functionality exist in I O S? I was very clear when I spoke to apple that I was using an iphone, so I'm hoping they gave me some good info. Please let me know if there's a way to change the punctuation level.