It does seem though that the majority of uses of "open source" describes Free Software. This is in line with the origins of the phrase as well - it was created

It does seem though that the majority of uses of "open source" describes Free Software. This is in line with the origins of the phrase as well - it was created to remove the confusion stemming from the adjective "free": https://opensource.com/article/18/2/coining-term-open-source-software https://opensource.com/article/18/2/coining-term-open-source...