"Deep contemplation" refers to the act of thinking deeply or reflecting profoundly on a particular subject or issue. It involves focusing one's thoughts and pondering deeply to gain a deeper understanding or insight. Full definition
They're a curious bunch, seemingly ordinary people who appear to have plenty of time for deep contemplation about life, death, and the course of time. (markreviewsmovies.com)
After staring them down in deep contemplation I decided their fate — to the oven! (mindbodygreen.com)
Then elaborate by deeper contemplation on what you have written. (mindfulhappiness.org)