Looking on the internet deeply has found these results:

improve is the most popular phrase on the web.

worst 1557,000,000 results on the web	improve 12,850,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Ricky Spanish... ...really is your worst persona ever. Gina. And it's disgusting at worst. Your worst fear realized So everyone here should overcome his worst fear. Molly faced her worst nightmare for you. My worst nightmare in one sentence. Power outage must be your worst nightmare.	We must improve road safety in the EU. Nanotechnology could improve combustion by designing specific catalysts with maximized surface area. And together we improve the original concept. Even Mr Darcy may improve on closer acquaintance. Gain power, their methods improve. SCWR's simplification should reduce construction costs and improve reliability and safety. In immobile individuals, physical compression methods improve blood flow. However, iron and vitamin supplements only infrequently improve the ulceration.

worst

1557,000,000 results on the web

improve

12,850,000,000 results on the web

More popular!

We must improve road safety in the EU.
Nanotechnology could improve combustion by designing specific catalysts with maximized surface area.
And together we improve the original concept.
Even Mr Darcy may improve on closer acquaintance.
Gain power, their methods improve.
SCWR's simplification should reduce construction costs and improve reliability and safety.
In immobile individuals, physical compression methods improve blood flow.
However, iron and vitamin supplements only infrequently improve the ulceration.