What is the difference between tid and gang ?Feel free to just provide example sentences.

'Tid' is used mostly when talking about time measurements. A helpful rule of thumb: If you can think of whatever you want to describe in the context of a clock or a calendar, it's likely that you will use 'tid'.

'Gang' is used mostly for discrete instances of events that happen repeatedly. More specifically, we mostly use it to describe a particular instance of those repeated events.

Examples:
"Reading takes time" – with our rule of thumb, we see that we could describe the exact time reading actually takes using minutes or hours, and hence we use 'tid': "lesing tar tid".

"This time around" – here we are referring to a particular instance (*this* time) in a sequence of multiple events, so we'll use 'gang': "Denne gang"

"That time we went to the beach in Norway" – This maybe a bit more ambiguous, but if you think about going to the beach as something that can happen one or more times (sequence of events), and in this sentence we are referring to the particular time we went to the beach in Norway, we end up with 'gang': "Den gang vi dro på stranden i Norge".