In Content Ads for WordPress

I want to have ads automatically show up in the content of my WordPress post.

The plugin should count the content of the post and place the ad code at (let's say) 1/2, 1/4, 3/4 etc of the content.

I know there was such a plugin about 2 years ago, but the developer didn't continue updating it. It placed the AdSense code within the post content:
- randomly within a post's content
- after a specific number of paragraphs from the post
- after a specific portion (1/8, 1/4, 1/2 etc)

Something like this: https://wordpress.org/plugins/easy-adsense-lite/

- Idea from jsoto22