I need to setup a cronjob on my webhost.

The documentation for my webapp reads as follows:

you will need to create following cronjob: /public_html/cake/console/cake -app /public_html/app master

Also, I want any output written to a log file. My hosts documentation says this:

You can have cron send an email everytime it runs a command. If you do not want an email to be sent for an individual cron job you can redirect the command's output to /dev/null like this: mycommand >/dev/null 2>&1

Can someone help me write the cron job? I dont know the syntax at all. Thanks for the help!