Comparatively good times when gambling takes place? (6,4)

I believe the answer is:

better days

I'm a little stuck... Click here to teach me more about this clue!

'gambling takes place?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'comparatively good times' is the wordplay.
'comparatively good' becomes 'better' (I've seen this before).
'times' becomes 'days' (day is a unit of time).
'better'+'days'='BETTER DAYS'

'when' is the link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.

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