| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | trimester | United States | Trimester commonly refers to the three-month periods into which a human pregnancy is divided, typically expressed as first trimester, second trimester, and third trimester. | 1 |
| 2 | trimester | United States | Refers to three-month periods in pregnancy and academic calendars. | 1 |
| 3 | trimester | United States | Commonly used to refer to the three-month periods of pregnancy. | 1 |