You can bulk-redact all instances of a particular word or phrase in a document.
Instructions
Log in to your account.
Click on the All Requests tab:

Select the request number in the Request column:

Select the Documents tab:

Hover over the document and click the More button (icon with three dots):

Select Redact file (wrench icon) from the drop-down menu:

Click the Search button:

In the Search field, type the word or phrase that you want to redact, then press Enter:

Click the Redact button:

Select the Redact All button:

Click the Save button:

Click the Save to Request button in the pop-up window to save the redacted document directly to the request:

Note:
The redacted document will be saved under the same file name with the word 'redacted' added at the end.