keyword

free online physics books

Monthly search volume and cost-per-click data for "free online physics books" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=free+online+physics+books&country=us" +--------------+------------------+ | volume | 20 | | cpc | $5.2 | | competition | 0.24 | | country | US | | updated | 2026-06-15 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
free physics online reading	90	$15.05	8/20
free book on physics	50	$12.44	8/20
free books for physics	50	$0	8/20
free books on physics	50	$0	8/20
physics books free	50	$0	8/20
physics free books	50	$12.44	8/20
free physics books	40	$0	9/20
free physics textbooks online	30	$4.66	9/20
free online physics textbook	30	$4.66	8/20
e book physics	10	$0	10/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=free+online+physics+books&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt