open the terminal, type "su" and press "enter and then enter roots password when asked and then type the following command:
tune2fs -c 0 /dev/ABCD
where "ABCD" is the partition you do not want to be autochecked after couple of mounts/time passed
You should strongly consider the consequences of disabling mount-count-dependent checking entirely. Bad disk drives, cables, memory, and kernel bugs could all corrupt a filesystem without marking the filesystem dirty or in error. If you are using journaling on your filesystem, your filesystem will never be marked dirty, so it will not normally be checked. A filesystem error detected by the kernel will still force an fsck on the next reboot, but it may already be too late to prevent data loss at that point.
you can, once in a while force a file system check by typing the following command on the terminal as root and restart your computer:
edit to add a missing "s" at the end of the command