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, Providence's Kris Dunn posted an assist rate of 41.8 in 2015-2016. This was good for 5th in the country.
ARate = 100 * 206 / (((1088 / (7075 / 5)) * 881) - 184) = 0.4175 * 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, Connecticut's Shonn Miller posted a 7.2 turnover rate in 2015-2016. This was rated 9th amongst all Division-I players.