How Much Is Hillary Clinton's $275 Billion Infrastructure Spending?

It has become a common practice for reporters to refer to former Secretary of State Hillary Clinton's proposal to spend $275 billion on infrastructure. Is this a lot of money? My guess is that almost no one reading the number has a clue. Certainly Secretary Clinton wants people to think it is a major commitment.

While there is no obvious yes or no answer, it would help first of all if reporters started by giving a time frame. Spending $275 billion over one year is a much larger commitment tha...