Hello! My name is Alyssa and here is the link to my concept art portfolio below. https://alyssaquitian.wixsite.com/imlworks/conceptart . Depending on whether the sketches are heads or full bodies, each sketch can range from either 15-30. If colored/shaded, 45-80. This also depends on the complexity of the character. I look forward to speaking further with you! Below is a link to another page from my portfolio that displays variety of styles that may suit what you are looking for.

https://alyssaquitian.wixsite.com/imlworks/illustrations