He wrote the story with his friend's 'assistance'. = He wrote the story 'with the assistance of' his friend. [=his friend helped him to write the story]
Our family had to 'go on public assistance' [=receive money from the government] when my parents lost their jobs.
Nobody 'came to her assistance' [=nobody helped her] when her car broke down.
(..) In full, my lord Hand. Good. Time to start incurring a new one. We have hungry people to feed. Can we expect some assistance in this regard? Indeed we can. Lord Davos, we have an armada to rebuild and ports to repair. We have. These projects (..)2019 TvShow: Game of Thrones Title: The Iron Throne Season: 8 Episode 6