keyword

free biology textbooks

Monthly search volume and cost-per-click data for "free biology textbooks" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=free+biology+textbooks&country=us" +--------------+------------------+ | volume | 140 | | cpc | $4.46 | | competition | 0.03 | | country | US | | updated | 2026-06-28 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
biology textbook free	140	$4.46	16/20
biology online free textbook	70	$7.71	15/20
biology online textbook free	70	$7.71	15/20
free biology textbook online	70	$7.71	15/20
free online biology textbook	70	$7.71	15/20
free online biology textbooks	50	$0	16/20
biology free online textbook	50	$0	15/20
free biology book online	50	$0	15/20
biology books free	40	$6.18	15/20
free biology book	40	$10.11	15/20

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://api.seodata.dev/v1/keyword?q=free+biology+textbooks&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