I feel that 5 minutes was reasonable given it wouldn’t be seen by too many people yet.
I am extremely used to typing my comment out and then noticing my many grammar mistakes afterwards.
It’s often that it takes me multiple attempts to fix my comments, especially given how bad Google Keyboard has gotten with autocorrect.
I had owned SwiftKey Pro from before Microsoft bought it, but wasn’t happy with it as it felt like it didn’t get any updates.