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.
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Question: Sentence: Some clock-shift problems could be avoided by adjusting clocks continuously or at least more graduallyfor example, Willett at first suggested weekly 20-minute transitionsbut this would add complexity and has never been implemented.
Question: Willett's first suggestion was to change clocks by 20 minutes how often?

Answer: weekly

Question: Sentence: The most catastrophic earthquakes we know of occurred in 31 BCE, 363, 749, and 1033 CE, that is every ca. 400 years on average. Destructive earthquakes leading to serious loss of life strike about every 80 years. While stringent construction regulations are currently in place and recently built structures are earthquake-safe, as of 2007[update] the majority of the buildings in Israel were older than these regulations and many public buildings as well as 50,000 residential buildings did not meet the new standards and were "expected to collapse" if exposed to a strong quake. Given the fragile political situation of the Middle East region and the presence there of major holy sites, a quake reaching magnitude 7 on the Richter scale could have dire consequences for world peace.
Question: How often do earthquakes that lead to serious loss of life occur?

Answer: every 80 years

Question: Sentence: American Idol was nominated for the Emmy's Outstanding Reality Competition Program for nine years but never won. Director Bruce Gower won a Primetime Emmy Award for Outstanding Directing For A Variety, Music Or Comedy Series in 2009, and the show won a Creative Arts Emmys each in 2007 and 2008, three in 2009, and two in 2011, as well as a Governor's Award in 2007 for its Idol Gives Back edition. It won the People's Choice Award, which honors the popular culture of the previous year as voted by the public, for favorite competition/reality show in 2005, 2006, 2007, 2010, 2011 and 2012. It won the first Critics' Choice Television Award in 2011 for Best Reality Competition.
Question: How many times was American Idol nominated for an Emmy?

Answer:
nine