Golf, unlike most ball games, cannot and does not utilize a standardized playing area, and coping with the varied terrains encountered on different courses is a key part of the game. The game at the usual level is played on a course with an arranged progression of 18 holes, though recreational courses can be smaller, often having nine holes. Each hole on the course must contain a teeing ground to start from, and a putting green containing the actual hole or cup 4 1⁄4 inches (11 cm) in diameter. [1]https://en.wikipedia.org/wiki/Golf#Golf_course
Every round of golf is based on playing a number of holes in a given order. A “round” typically consists of 18 holes that are played in the order determined by the course layout. Each hole is played once in the round on a standard course of 18 holes. The game can be played by any number of people, although a typical group playing will have 1-4 people playing the round. The typical amount of time required for pace of play 18-hole round is 4 hours for two players.
According to GolgNewsNet.com[2]https://thegolfnewsnet.com/golfnewsnetteam/2020/01/30/how-much-time-play-18-holes-9-holes-golf-74399/, pace of play really depends on a lot of factors: the skill level of the players in your group and on the course, the difficulty of the course, the space in between holes and how many people are on the golf course. That could bump up a reasonable pace of play to 4 hours, 30 minutes. Some country clubs demand players go quicker than 4 hours for 18 holes, asking them to wrap it up in 3 hours, 30 minutes — and that’s walking, not with a cart, which doesn’t usually speed up play all that much.