Time use survey (TUS) is a kind of research which shows time use conditions of people in a certain area of field. Time use research in study field could be regarded as a branch of time use survey.

时间利用调查是一种通过收集某个地区或领域人群的时间利用信息，来获取该地区或领域人群时间使用情况和特点的一种研究方法。

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Research your field or area of interest on a site like salary.com.

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"This area of research into the possible link between sleep apnea and heart disease is very much an emerging field of study, " Dr. Somers says.

CNN: Sleep apnea: Can it cause heart disease?