Friday Fun: Google Trends
Google Trends lets you compare search volumes for multiple terms.
Today, of course, is Friday the 13th.
Which brings more bad luck, Friday the 13th or having a black cat cross your path? Google Trends won’t tell you that, but it will compare how often those terms are searched.
“friday the 13th” 
“black cat”
Other things that bring bad luck: singing before breakfast, three butterflies together, and sending explicit text messages to Congressional pages barely a third your age.
