Sstrhsrtj

I am trying to specify the citation of a data base. Consider the following MWE with two entrances:`

documentclass[12pt, bibliography=totocnumbered, listof=totoc]{scrartcl}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{lmodern}

usepackage[ngerman]{babel}

usepackage{csquotes}



usepackage{filecontents}



%Bibliotheken

usepackage

[style=ext-authoryear,labelnumber, useprefix=true,

sorting=nyt,maxbibnames=9,maxcitenames=3,uniquelist=false, backend=biber, 

doi=false,isbn=false,url=false,

uniquename=false,bibencoding=utf8, date=year, giveninits=true, terseinits=false, dashed=false]

{biblatex}





%Doppelpunkt nach Jahr

renewcommand{labelnamepunct}{addcolonspace}



%Remove Dot after volume

renewbibmacro*{volume+number+eid}{%

  printfield{volume}%

%  setunit*{adddot}% DELETED

 % setunit*{addnbspace}% NEW (optional); there's also addnbthinspace

  printfield{number}%

  setunit{addcommaspace}%

  printfield{eid}}

DeclareFieldFormat[article]{number}{mkbibparens{#1}}



% Number of articles in parentheses

DeclareFieldFormat[article]{number}{mkbibparens{#1}}



%Dot after journal title

DeclareFieldFormat{journaltitle}{{#1}isdot}



renewbibmacro*{journal+issuetitle}{%

  usebibmacro{journal}%

  setunit*{addcommaspace}%

  iffieldundef{series}

    {}

    {newunit

     printfield{series}%

     setunit{addspace}}%

  usebibmacro{volume+number+eid}%

  setunit{addspace}%

  usebibmacro{issue+date}%

  setunit{addcolonspace}%

  usebibmacro{issue}%

  newunit}





%Dort und Sorting Last-First

DeclareNameAlias{sortname}{first-last-bold}



DeclareNameFormat{first-last-bold}{mkbibbold{%

  ifgiveninits

    {usebibmacro{name:last-first}{namepartfamily}{namepartgiveni}{namepartprefix}{namepartsuffix}}

    {usebibmacro{name:last-first}{namepartfamily}{namepartgiven}{namepartprefix}{namepartsuffix}}%

  usebibmacro{name:andothers}}}





begin{filecontents}{jobname2.bib}

@Article{Hansen2011,

  author  = {Hansen, Peter R. and Lunde, Asger and Nason, James M.},

  title   = {The Model Confidence Set},

  journal = {Econometrica},

  year    = {2011},

  volume  = {79},

  number  = {2},

  pages   = {453-497},

  url     = {https://EconPapers.repec.org/RePEc:ecm:emetrp:v:79:y:2011:i:2:p:453-497},

}



@WWW{Amadeus2018,

  author  = {Bureau van Dijk},

  title   = {Amadeus},

  year    = {2018},

  url     = {https://www.bvdinfo.com/en-us/our-products/data/international/amadeus},

  urldate = {2018-11-24},

}







end{filecontents}

addbibresource{jobname2.bib} 



begin{document}

textcite{Hansen2011}

textcite{Amadeus2018}

printbibliography

end{document}

However, I want to specify the citation of the data base as:

Bureau van Dijk (2018). Amadeus. Zugriff am 24.11.2018. www.bdv...

In particular I want surpress the word "url", change the order of the site and the date, replace the word "besucht am" with "Zugriff am" without parantheses and in contrast to the citation of the article, the colon is to be replaced by a simple dot before the year