keyword

21 x 3

Monthly search volume and cost-per-click data for "21 x 3" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=21+x+3&country=us" +--------------+------------------+ | volume | 8,100 | | cpc | $0.75 | | competition | 0.03 | | country | US | | updated | 2026-06-06 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
2 x 1/2	18,100	$2.14	8/20
21 x 5	14,800	$1.01	8/20
3 x 1/3	5,400	$0.3	9/20
3/4 x 3	4,400	$0	9/20
2/3 x 4	3,600	$0	10/20
21 divided by 3	3,600	$0	10/20
5/3 x 7	2,900	$0	9/20
9 x 3/4	1,900	$0	9/20
10 x 4	1,300	$0	9/20
2/5 x 3/5	1,300	$1.78	9/20

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=21+x+3&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