keyword

developmental milestones 21 months

Monthly search volume and cost-per-click data for "developmental milestones 21 months" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=developmental+milestones+21+months&country=us" +--------------+------------------+ | volume | 720 | | cpc | $0.52 | | competition | 0.09 | | country | US | | updated | 2026-06-30 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
21-month-old milestones	2,400	$0.75	20/20
21 month old milestones	2,400	$1	15/20
21 month-old milestones	1,900	$0.97	16/20
21-month old milestones	1,900	$0.66	16/20
milestones for 21 month old	1,900	$0.97	16/20
21 months developmental milestones	720	$0.67	16/20
21 months milestones	720	$0.67	16/20
milestones 21 months	720	$0.52	16/20
21 months old development	50	$0.03	16/20
development of 21 month old	50	$2.63	15/20

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://api.seodata.dev/v1/keyword?q=developmental+milestones+21+months&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