GAE的搜索API简单搜索的定义是什么？

I use golang for GAE to implement search api.

In the dashboard it shows I call 15.48 * 10k query

Search API Simple Searches  15.48 10K Ops  --   --    Standard rate

But I am pretty sure I only call search api less than 1000 times.

Accorcading to the offical web site - search price

enter image description here

Here is my code

func (api GoogleSearchAPI) Search(queryString string, options search.SearchOptions, ctx context.Context) []interface{} {

var list []interface{}

for t := api.SearchIndex.Search(ctx, queryString, &options); ; {
    var siteArticle SiteArticle
    id, err := t.Next(&siteArticle)
    if err == search.Done {
        break
    }
    if err != nil {
        logger.Error(err)
        break
    }

    list = append(list, id)

} //for

return list

}

I am just curious what's the definition of GAE's search API simple searches?

It's query by web service api or SDK function call ?

Is it possible it count every iterator to get query result as one query ?

Please help~