Learn foreign language: 1 hour of Korean today. To become a conversational speaker, people use around 3,000 words [edit: 1k words]. If I learn 5 new words per day, it would take 600 days, or 1.5 years to speak fluently in Korean. However, I plan on upping the learning curve, and learn 15 words per day (through 1.5 to 2 hours of practice).
That sounds like you are using an inefficient learning system.
I think that 15 words per day should take a lot less than 1.5 hours if you use software like Anki