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The Google search terms 'diabetes' and 'recipe' have contrasting patterns repeated each year over the festive period covering

The Google search terms 'diabetes' and 'recipe' have contrasting patterns repeated each year over the festive period covering November to January. Could this be evidence of human behaviour from big data?

I'm on a Big Data MOOC #FLbigdata and was introduced to this tool on Google.

I've shown in the graph a section covering the last December period but each year (going back to 2004) has a similar pattern. Recipe is searched much more often than diabetes but if the data for each keyword is downloaded separately the data is normalised by Google so it fits neatly on the same graph.

It looks like this period greatly affects the searches with a double wave in both search terms. However, the timing of the first wave is earlier for diabetes and the second wave is in the opposite direction.

Could this represent an earlier preparation for Thanksgiving and Christmas festive seasons by people with diabetes? Could the Christmas / New Year period be a 'holiday' from searching about diabetes (when others are more eagerly searching for food)? It would be good to look at periods covering Ramadan or Easter as well though they would need some adjustments as the dates vary.

Source: www.google.com

diabetes period covering wave google festive data recipe