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keyword

when did world war 2 start

Monthly search volume and cost-per-click data for "when did world war 2 start" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=when+did+world+war+2+start&country=us" +--------------+------------------+ | volume | 90,500 | | cpc | $7.91 | | competition | 0 | | country | US | | updated | 2026-06-07 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
ii world war 201,000 $2.16 20/20
second world war 2 201,000 $2.16 20/20
war world two 201,000 $2.16 20/20
second war 2 165,000 $4.61 20/20
world war 2 165,000 $3.55 20/20
world war second 165,000 $4.61 20/20
when did the second world war start 90,500 $7.91 20/20
when did ww2 start 90,500 $8.21 20/20
second world war date 60,500 $10.73 20/20
when was ww2 60,500 $8.43 20/20

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=when+did+world+war+2+start&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