Generally speaking, cabinet committees meet when the House is in session. Sometimes they'll have a meeting the week before the House comes back. After the summer break, there may be meetings the week before the House comes back. At particularly busy times of year, around Christmas, say, or in June, just when the House is getting ready to adjourn, they might meet the week after.
It is not unusual when the House is in session for committees to meet every week or every two weeks. There is a large volume of business that has to go through, whether it goes through one of the subcommittees like social affairs, or whether it goes through the economic committee. Then, of course, there are the foreign affairs and defence streams as well.