Job Application Forms

I'm trying to fill out a job application and in a previous position, the contract was zero hours and after a month or so I just wasn't given any more. I would like to include this in my application since the skills acquired are directly relevant, but under "reasons for leaving", what would be the appropriate wording?

Also in the "employment history" section it asks for duties and responsibilities. What's the appropriate number of points to put down?

Don't ever fill in 'reason for leaving', they can ask directly at interview if they really need to know.

Put down as many points as are relevant to the new job you are applying for.

Don't touch with a 10 foot pole. Gotcha. What about reasons for employment gaps?

Not unless they ask specifically. Your role in a job application is only 1) to be honest and 2) to present the very best view of yourself with respect to this role. Everything else, it's up to them to ask if they want to know.

Ye even when they ask what my salary was... well they can go suck it. What about start and end dates for previous employment.

Don't ever fill in 'reason for leaving', they can ask directly at interview if they really need to know.

Put down as many points as are relevant to the new job you are applying for.

If they do ask, what's the best way for me to answer without shooting myself in the foot?