WHat does terms in office means? does it mean the number of years the person has hold that position?

ex) barbara boxer had been senator for 4 terms(in progress)

Senators serve 6-year terms. So, Sen. Boxer will have served 24 years at the end of this term.

for terms in office i would write 4 terms( in progress)?

Yes.

Yes, "terms in office" refers to the number of times a person has been elected or appointed to a particular position. In the context you mentioned, if Barbara Boxer has been a senator for four terms, it means that she has been elected or re-elected four times to serve as a senator.

Each term typically has a specific duration, which varies depending on the position and jurisdiction. For example, in the United States, a senator's term is six years, while a president's term is four years. So, if Barbara Boxer has been serving as a senator for four terms, it means she has held that position for a total of 24 years.

To determine the number of terms a person has served, you would need to look at their electoral or appointment history for that position. This information is usually publicly available through official government websites, news archives, or biographical sources.