The best way to determine the usage your wife need each month is to visit the Data Plan page on our verizonwireless.com website. We have a feature called the Data Calculator that will allow you to enter your usage type and it will give you information on how much data is need to perform those task. I have provided a link directly to that page below:
You can also have you wife monitor her usage by Dialing #DATA (#3282) from her phone. She will receive a free text message with her usage and can also listen to the information on the phone.
Re: Bing vs. Google ...
On my device, since it came loaded with Bing, I have to open the browser to use Google. Whereas the Bing search app is on the home screen ... that still uses data though.