Figure 5: Proportional measures of frequency of entries of the search term “preanesthesia” compared to the search phrase “before anesthesia” by online users at the main google search page ( over the time period 2004 – 2010 (x-axis). Each measured time point is expressed as a normalized percentage of the maximum search frequency for all phrases. Google users tend to use the more conversational phrase “before anesthesia” rather than a more common hospital term “preanesthesia”. Results are screen shots from the authors’ computer using Google Insights for Search ( insights/search/#; accessed: April 30, 2011).