'find' command is not returning files older than two days

Issue

• We're searching for files older than two days in a mount point, but there is no output.
• We're trying to delete files older than two days in a NFS mount point, but the following command doesn't return any files:

# find /mount/point/ -type f -atime +2
# find /mount/point/ -type f -ctime +2
# find /mount/point/ -type f -mtime +2