Hi there,
Yes you can.
What you'd look at doing is setting up your schedule to backup on specific days.
You'd choose the option to run according to a schedule, and then set your day interval to 14 days (every 2 weeks) from a specific date/day.
You then set up your backup type: FULL, INCREMENTAL, or DIFFERENTIAL. On a 2 week gap between backups, I'd stick with FULL unless you have a space issue with your tape.
As for file deletion, when it's delete from the system, it's gone immediately. Your overwrite protection protects when the tape gets overwritten. But if it's deleted after 9 days, you'd only be able to restore the file as of the previous backup job.
Let me know if this is all OK?