You probably mean the German expression "dreiviertel zwei". This expression is however not used everywhere in Germany because in other regions it may be said as

You probably mean the German expression "dreiviertel zwei". This expression is however not used everywhere in Germany because in other regions it may be said as - "viertel vor zwei" (approx. "quarter to two") or - "Dreizehn (Uhr) fünfundvierzig"/"Ein Uhr fünfundvierzig" (The exact time as you would read it off of a (digital) clock/watch) When I imagine it from the English-speakers perspective, I think "viertel" (quarter), "halb" (half) and "dreiviertel" (three quarters) are probably to be understood like this: "halb zwei" = "half two" = "1/2 2" = (2 - 1 hour) + ((1/2) * 1 hour) = 1.5 = 01:30