keyword

us history free online textbook

Monthly search volume and cost-per-click data for "us history free online textbook" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=us+history+free+online+textbook&country=us" +--------------+------------------+ | volume | 30 | | cpc | $0 | | competition | 0.06 | | country | US | | updated | 2026-03-30 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
us history textbook	4,400	$0.64	19/20
united states history textbook	4,400	$0.64	17/20
american history textbooks	3,600	$0.55	15/20
online american history textbook	320	$3.47	15/20
free us history textbook	50	$5.44	16/20
free american history textbook online	30	$0	17/20
free online us history textbooks	30	$2.23	17/20
free us history textbook online	30	$0	17/20
us history textbook online free	30	$2.23	17/20
free online american history textbook	30	$2.23	16/20

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=us+history+free+online+textbook&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt