- It is now fifteen minutes of three. - "Grace Harlowe's Senior Year at High School or The Parting of the Ways", Jessie Graham Flower.
- What was she doing in this room fifteen minutes before you found my lady dead? - "A Terrible Secret", May Agnes Fleming.
- Sometimes his horses were put to and kept waiting for him twelve or fifteen hours at a time. - "The Memoirs of Louis XIV., Volume 9 And His Court and of The Regency", Duc de Saint-Simon.