The phrase "a total of three months" is correct and usable in written English.
It can be used when specifying a duration or time frame in a clear and precise manner.
Example: "The project will take a total of three months to complete, including all phases of development."
Alternatives: "a duration of three months" or "three months in total".
A move to Denmark, at 18, to visit a friend, left Ms. Castelli hospitalized three times (for a total of three months) in a 13-month period.
Between March 2011 and July 2012, Mr. Shepherd visited North Korea four times, spending a total of three months climbing and photographing 24 Baekdudaegan peaks.
He gave the apartment a style he describes as "very Weimar Republic," outfitting it with heavy upholstered pieces, but stayed there only a total of three months in the seven years that he owned it.
Mr. Hambrick, a platinum member of the loyalty program of Starwood Hotels and Resorts Worldwide, has stayed at one of its hotels, the Westin Embassy Row in Washington, a total of three months this year and was upgraded to the presidential suite for five days during one visit.
The four provincial tours that Louis Stanislas took before the year 1791 amounted to a total of three months.
It took a total of three months for him to manufacture a $12 million dollar budgeted film grossing a stupidly terrible $4.9 million, and it took slightly less than a month for it to be stripped from theaters.
Salyut 1, which was launched April 19 , 1971 atop a Proton rocket, was outfitted from the start to support two three-man crews for a total of two months over a six-month period.
Each intervention is based on a design that alternate two one-month On (intervention) and Off (control) periods over a total of four months.
Piaf stayed with her for a total of eight months.
The agency already prohibits donations by anyone who spent a total of six months in Britain between 1980 and 1996.
This week, they asked for a total of six months of extra time.
