seodata.dev

keyword

ch21

Monthly search volume and cost-per-click data for "ch21" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=ch21&country=us" +--------------+------------------+ | volume | 70 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-16 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
ch 21 720 $0 6/20
ch-21 720 $0 6/20
chapter 21 720 $0 4/20
ch 21 helicopter 480 $0 3/20
ch-21 helicopter 480 $0 3/20
ch-21 shawnee 90 $0 3/20
shawnee helicopter 70 $0 3/20
21 lg 50 $1.19 4/20
what is chapter 21 30 $0 5/20
lg ch21 30 $0 3/20

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=ch21&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