Okay so for the last few weeks my MacBook Pro has been freezing for about 10 seconds at a time. It happens numerous times a day and I don't know why. I'm running High Sierra 10.13.6. I thought it was just the trackpad and perhaps keyboard as well but even the seconds on the menu bar clock freeze as well so I'm assuming it's more of a system thing. Any advice? I've used Macs for many years but have not experienced this before.