An individual player's ability to distribute the ball and avoid turnovers is measured by 2 stats.
A player's assist rate is computed by taking a player's total assists divided by the made field goals by the player's teammates while the player is on the court.
Here is the calculation:
ARate = 100 * AST / (((MP / (Team's MP / 5)) * Team's FG) - FG)
For example, Oklahoma State's Juwun Evans posted an assist rate of 44.1 in 2016-2017. This was good for 3rd in the country.
Evans had 204 assists in 936 minutes played compared to his team's 6600 total minutes. Oklahoma State made 957 field goals to Evans' 211 field goals.
ARate = 100 * 204 / (((936 / (6600 / 5)) * 957) - 211) = 0.441 * 100
Turnover rate is the percentage of a player's possessions used on turnovers. It's complicated to measure and explain for individual players.
Remember when assessing a team's turnover rate, you take the percentage of possessions that end in a turnover.
For an individual player, turnover rate uses personal possessions. This means context is important. Players that don't handle the ball often or at all will have a deflated turnover rate. A point guard who constantly has the ball will likely have a higher turnover rate.
For example, Butler's Avery Woodson posted a 5.3 turnover rate in 2016-2017. This was rated 3rd amongst all Division-I players.
Around 5 percent of Woodson's personal possessions ended in a turnover.