Time difference? (Duration of trade)

Hi,

I'm trying to write a bot that uses duration a trade has been opened.

So far I've got:

 Print(positionPain.EntryTime - Time);

Which prints: -00:01:34.47000 etc.

But I need to compare this to some set value. For example if trade has been opened for longer than 2 hours.

I tried using greater than sign:

"if (positionPain.EntryTime - Time > 120)"

But it didn't work.

How can I conduct logical operations on a 'time' difference?