Question

What is time- span in connection with historical events?

Answer 1

Your question: what is time-span in connection with history?

Answer: Time-span refers to a period of time. More precisely, an approximate period of time for an event to be considered when there is no specific date that can be fixed for that particular event that happened in the past.  

Example: Practice and abolition of Sati in India.  

There are no specific dates that are to be considered as the starting and ending date of Sati in India. Hence we formally say that the practice of sati has been stopped back in 19th century.

Answer 2

Answer:

When a particular and specific date cannot be marked for an event in the past and only a rough time period can be fixed. This period of time is named as the time-span.

When we discuss changes that happened in certain social practices, and therefore specific dates cannot be fixed. Instead,  only a time-span can be mentioned, like an example that people in India gave up the practice of Sati during the late 19th century.