free acquisition
Computing term for acquiring something without payment, such as software or digital content obtained at no cost.
This software can be acquired free of charge.
Analyze data acquired for free.
無料 is a general term for 'free of charge', while 無償収集 specifically refers to the act of acquiring something without payment, often in computing contexts.
収集 means 'collection' or 'gathering'; 無償収集 adds the nuance of doing so without cost.
Compound of 無償 (free of charge) and 収集 (collection, acquisition).