The phrase "minor instances" refers to small or insignificant occurrences, events or situations that are not particularly important or significant. Full definition
The picture transfer is generally excellent, though there are minor instances of what appear to be vertical scratches on the camera negative. (theasc.com)
Don't let this very, very minor instance distract you from what is a truly entertaining and immersive sound experience. (dvd.net.au)
It must be more than minor instances of misconduct. (supremeadvocacy.ca)