Lottery

A lottery was a game in which people could win money.

History
The National Lottery was a municipal lottery played in the United Kingdom. (TV: Rose, School Reunion, The End of Time)

The physics teacher at Deffry Vale High School retired after she won the lottery, despite never having played it. (TV: School Reunion)

The Doctor's wedding present to Donna Noble was a lottery ticket purchased with money borrowed from her father. (TV: The End of Time)

When needing to gain access to Kazran Sardick without the interference of his staff, the Eleventh Doctor arranged for them to win the lottery, even though it did not exist. The Doctor simply called them very lucky. When Kazran ordered him out, and he travelled back to Kazran's childhood, the Doctor acted as his babysitter, after his usual babysitter won the lottery, even though it did not exist, even back then. (TV: A Christmas Carol)

While working to stop a Cyberman invasion of 18th century Klimtenburg, the Eleventh Doctor was about to reassure some of the villagers that the likelihood of a Cyber guard finding them was as likely as winning the lottery. He was interrupted when the Cyber guard found them, causing him to complain that he never won the lottery unless he travelled forward in time and checked the numbers first. (PROSE: Plague of the Cybermen)