My german friend taught me this. Now I do exactly what you say, if it's an approximate, I say 5-10 mins. If I'm being more precise, I'll say 4 mins, 7 mins et

My german friend taught me this. Now I do exactly what you say, if it's an approximate, I say 5-10 mins. If I'm being more precise, I'll say 4 mins, 7 mins etc, which does exactly what you mention: it "suddenly" turns the approximation into a time critical event.