Whatever works for you keep doing it until you do something else.
Might start out with a coyote bark for 10/15 seconds. Then either a cottontail, snowshoe or jackrabbit squeal. Maybe a pheasant call, prairie dog or vole depending upon your area.
Coyotes always seem to be hungry, so if they are in the area they will come - major problem is how smart are they and how smart are you? If they are educated - meaning they have survived their 1st year - they will probably want to get the scent and if you haven't taken that into consideration in establishing your hide location - he'll flake you and you'll never see him.
I would imagine night thermal hunting is different whereas you'll see him a ways out maneuvering to get your scent.
Sometimes they just aren't in your area when you set up. I've wasted some gas driving around at night to locations I've spotted in the day time and just set up the caller and territorial howled or challenge howled - if I hear a response, I know that area contains a coyote/coyotes and I'll give it a go in the next day or two. Sometimes you see them, sometimes you don't.
Living in snow country, you can waste gas driving back roads at 6AM immediate after getting a couple inches of snow looking for tracks - a good indicator that a coyote might be in the area or at lease close enough to hear your caller.
Pup distress, adult distress, food fighting, hunting whines, cow calf distress, crow distress - they all work - sometimes
. Sometimes you get cattle, deer and more coming to those sounds.
The above is in context to day hunting - night thermal hunting seems to be a lot more productive relative to seeing and shooting at coyotes - almost like using hounds on a mountain lion hunt.
Young guys will hike in to a hide and call for 10/15 minutes and move on - a very experienced coyote hunter might hike in and stay for 30/45 minutes calling and eat a snack before walking back to the pickup. Both can be successful.
experienced used in this sense can also be interchangeable and called an elderly senior citizen.
I called in fox & coyote back in the early 60's using a Herters field record player using scratchy 45 rpm records of a squealing rabbit. Wish I still had that set up just to see if it would still work relative to bringing in a hungry coyote. Either the coyote has gotten smarter or the marketing guys have gotten smarter whereas they have us purchasing all types of expensive equipment for calling coyotes.