There are a few ways you can find keyword search volume for free:

1. Google Ads Keyword Planner: This tool, which is part of the Google Ads platform, allows you to enter a keyword and get an estimate of its monthly search volume. It also provides data on the competitiveness of the keyword and suggests related keywords. To use the Keyword Planner, you’ll need to set up a Google Ads account, but you don’t need to run any ads or spend any money to access the tool.
2. Google Trends: This tool allows you to see how a keyword has trended over time, including its search volume and regional interest. It’s a good way to get a sense of the popularity of a keyword and how it compares to other keywords.
3. Google Search Console: If your website or app has been verified in Google Search Console, you can see data on the search queries that have led users to your site. This can give you an idea of the keywords that are driving traffic to your site, as well as their search volume.
4. Other keyword research tools: There are also a number of other keyword research tools available that offer data on search volume and related keywords. Some of these tools, such as Ahrefs and SEMrush, offer a limited number of searches for free, while others, like Keywordtool.io, offer more extensive data for free.

Keep in mind that the search volume estimates provided by these tools are estimates, and the actual search volume for a keyword may vary. It’s also important to note that the data provided by these tools is typically for desktop search, so the search volume for mobile devices may be different.