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urinary frequency stresses
med.	частое мочеиспускание (urination at short intervals without increase in daily volume or urinary output, due to reduced bladder capacity Maria Klavdieva); частота мочеиспускания
urol.	учащённое мочеиспускание (Urinary frequency can be defined as needing to urinate more than 7 times in a period of 24 hours while drinking about 2 liters of fluid. However, individuals differ, and most people only see a doctor when urination becomes so frequent that they feel uncomfortable. 'More)