Google Trends is a new feature on the Keywords Relevancy tool that is represented by a small graph icon beside the open link icon of the Keyword Phrases on the Keyword Ranking table.
On click of the Google Trends icon, it will open a modal that displays a trend line for Google Trends from the Google Trends website. Similar to other trend lines, there will also be date range selectors on the upper right, and by default, the selected range is for the last 5 years (changed from the last 12 years).
The x-axis shows the dates based on the selected range and is displayed on a weekly basis (e.g. Sept. 19 - Sept. 25), while the y-axis shows the values.