What is overture? Where is it located?

I may have answered this question once before, but here it is again.

Overture is the number of time a word or words are searched in Yahoo each month. The overture tools are located here:

Search Term Suggestion Tool - USA / USA
Search Term Suggestion Tool - UK / UK
Herramienta de sugerencia de palabras - Spain / España
Suggestion de mots cl? - France / France
Search Term Suggestion Tool - Austria / Österreich
Search Term Suggestion Tool - Germany / Deutschland
Suggeritore di parole chiave - Italy / Italia
Search Term Suggestion Tool - Japan
Search Term Suggestion Tool - Korea
Tref woord suggestie -tool - The Nederlands / Nederlands
Search Term Suggestion Tool - Switzerland / Schweiz
Search Term Suggestion Tool - Australia / Australia
Ferramenta de Sugestão para Termos de Busca - Brazil / Brazil
Værktøj til Søgeords- Forslag - Denmark / Danmark
Hakutermien ehdotustyökalu - Finland / Suomi
Verktøyet for søkefraseforslag - Norway / Norge
Verktyg för förslag på söktermer - Sweden / Sverige
搜尋 字串 建議 工具 - Taiwan
Russian Yandex Wordstat