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keyword

3 basic categories of control

Monthly search volume and cost-per-click data for "3 basic categories of control" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=3+basic+categories+of+control&country=us" +--------------+------------------+ | volume | 30 | | 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
hierarchy of controls 8,100 $0 12/20
hierarchy of control 8,100 $2.03 11/20
hierarchy of hazard control 8,100 $0 11/20
control hierarchy 8,100 $0 10/20
hazard control hierarchy 8,100 $2.03 6/20
hazard controls hierarchy 8,100 $0 6/20
hierarchy controls 8,100 $2.03 6/20
hierarchy hazard control 8,100 $0 6/20
hierarchy of hazard controls 8,100 $2.03 6/20
three basic categories of control 30 $0 12/20

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=3+basic+categories+of+control&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