You can now download all of your Google saved search history to see the list of terms you have search for using your Google account. To get the data for search history go to http://www.google.com/history. It will ask for your Gmail account credentials. After entering your credentials you will see a page as shown in image (F: 1).
Here you can see the terms you have searched for sorted by date in descending order. To download the search history, search for the setting icons and click on download option as shown in image below (F: 2).
After clicking on download button, a download dialog will appear as shown below (F: 3).
Just click on Create Achieve button and your search history will start downloading to your Google drive account. You will receive an email from Google that your search history is ready for download as shown in image below (F: 4).
Downloaded archieve is stored in takeout folder of your Google drive account as shown in image below (F: 5).
Achieve contain json files as shown below (F: 6).
These json files contain the data for search term along with time stamp.