Inserting content using xdmp:eval for isolated (separate) transctions

insert-test-data.xqy

xquery version "1.0-ml";

declare namespace prop="http://marklogic.com/xdmp/property";
declare variable $doc-count as xs:int := 10;

for $item in (1 to $doc-count)
let $eval := "xquery version '1.0-ml';
declare variable $count as xs:string external;
xdmp:document-insert(fn:concat('/test/', $count, '.xml'), element root{ $count })"
return
(
	xdmp:eval($eval, (xs:QName("count"), fn:string($item))),
	xdmp:sleep(1000) 
)