Good question. I work for a large international airline for Line Maintenance.
Our definition is Daily Checks and Defect rectification.
Weekly checks can be done on the line, but only by arrangement, and I don't think any are done at present.
Also any job bigger than say a spoiler actuator would be done by a working party from Base. Mainly because we do not have the man power.
With A320's I get a base working party about once a year with about 2000 departures a year.