In this task, you're given passages that contain mentions of a time duration related quesry and we are supposed to write answer to a question that involves event “frequency", which refers to how often an event is likely to be repeated. For example, "taking showers" typically occurs ~5 times a week, "going to saturday market" usually happens every few weeks/months, etc. 
 Note that a lot of the questions could have more than one correct answers. We only need a single most-likely answer. Please try to keep your "answer" as simple as possible. Concise and simple "answer" is preferred over those complex and verbose ones.  

[Q]: Sentence: The Melbourne rail network has its origins in privately built lines from the 1850s gold rush era, and today the suburban network consists of 209 suburban stations on 16 lines which radiate from the City Loop, a partially underground metro section of the network beneath the Central Business District (Hoddle Grid). Flinders Street Station is Melbourne's busiest railway station, and was the world's busiest passenger station in 1926. It remains a prominent Melbourne landmark and meeting place. The city has rail connections with regional Victorian cities, as well as direct interstate rail services to Sydney and Adelaide and beyond which depart from Melbourne's other major rail terminus, Southern Cross Station in Spencer Street. In the 2013–2014 financial year, the Melbourne rail network recorded 232.0 million passenger trips, the highest in its history. Many rail lines, along with dedicated lines and rail yards are also used for freight. The Overland to Adelaide departs Southern Cross twice a week, while the XPT to Sydney departs twice a day. 
Question: How often does the XPT to Sydney depart?
[A]: twice a day


[Q]: Sentence: The Transat AG2R Race, held every alternate year, is an event which originates in Concarneau in Brittany, France, reaching St. Barthélemy. It is a boat race with boats of 10 m length with a single hull and with essential safety equipment. Each boat is navigated by two sailors. Kitesurfing and other water sports have also become popular on the island in recent years, especially at Grand Cul-de-Sac beach (Baie de Grand Cul de Sac) for windy sports as kitesurfing and Saint Jean Beach ( Baie de Saint Jean), Lorient, Toiny and Anse des Cayes for surfing. Tennis is also popular on the island and it has several tennis clubs, Tennis Clube de Flamboyant in Grand Cul-de-Sac, AJOE Tennis Club in Orient and ASCO in Colombier. 
Question: How often is the AG2R Race held?
[A]: every alternate year


[Q]: Sentence: Politics & Policy was founded at Northwestern and is dedicated to the analysis of current events and public policy. Begun in 2010 by students in the Weinberg College of Arts and Sciences, School of Communication, and Medill School of Journalism, the organization reaches students on more than 250 college campuses around the world. Run entirely by undergraduates, Politics & Policy publishes several times a week with material ranging from short summaries of events to extended research pieces. The organization is funded in part by the Buffett Center. 
Question: How often is Politics & Policy published?
[A]:
several times a week