Cornell University Library’s catalog page now offers a new option to let you parse your search results to see the most-recently added items in a given search.
Simply enter and perform a search, then scroll towards the bottom of the left-hand menu of options.
At the very bottom of the page, open the submenu marked Date Acquired.
This should give you a series of options to narrow your search to see only items collected in the past week, past month or since last year, along with giving you the number of items that fit each category. By choosing one of these options, you can see only items acquired within recent time periods.
Note that the categories are overlapping: For instance all items marked “Within the last month” will also appear under “Within the last year”.