Temporary only not continuing used

You can cancel a monthly subscription at any point, and restart it at any point, but you will have to pay for the full month, either way. There's no "pay per usage" licensing model.

But if all you need to do is print PDF files then you can simply use the free Adobe Acrobat Reader. You don't need to subscribe to anything.

Trial periods are for one week. And they are a trial, not a convenient way of doing some work - they are for people with a serious intention to buy for the full year.