Respuesta :
The most well-known periodization scheme is probably B.C. and A.D. This scheme basically divides history into two periods based on the approximate birth of Jesus Christ. B.C. stands for 'Before Christ,' and A.D. stands for a Latin phrase 'Anno Domini,' which means 'In the year of our Lord.
Answer:
Frequency and period are distinctly different, yet related, quantities. Frequency refers to how often something happens. Period refers to the time it takes something to happen. Frequency is a rate quantity.
Explanation: