The number that matters most: 1,000
Word frequency is wildly lopsided. A tiny set of words appears constantly, and a long tail of words almost never. That lopsidedness is your friend. The 1,000 most common words already cover about 85% of everyday speech. Learn those and most conversations stop being a wall of unknown sounds. You catch the frame of nearly every sentence and guess the rest.
The 1,000 most common words cover about 85% of everyday speech, so steady daily words compound into real comprehension quickly.
Adolphs & Schmitt (2003); Nation (2006)Coverage, and why 98% is the reading threshold
Understanding speech and reading a text are different bars. To read a general text comfortably, following it without stopping every line for the dictionary, you need to know about 98% of the words on the page. That is roughly one unknown word in fifty. Below that, reading turns into decoding and you lose the thread.
Hitting 98% coverage of unrestricted text takes a much bigger vocabulary: studies put it around 8,000–9,000 word families. But you do not start there, and you do not need to. You start with graded, comprehensible text where your current vocabulary already clears the bar, and you grow from the top of the frequency list down.
Reading a text comfortably takes knowing roughly 98% of the words on the page.Laufer & Ravenhorst-Kalovski (2010)
A realistic ladder
- ~500 words: you survive simple exchanges: greetings, numbers, ordering, directions.
- ~1,000 words: everyday conversation clicks into focus; ~85% coverage of speech.
- ~2,000–3,000 words: comfortable in daily life, can read easy Swedish (lättläst) and follow a lot of media.
- ~8,000+ words: read novels and newspapers without leaning on a dictionary.
How fast can you get there?
The maths is encouraging. At a steady pace:
| New words / day | To 1,000 words | To 2,000 words |
|---|---|---|
| 10 | ~14 weeks | ~29 weeks |
| 15 | ~10 weeks | ~19 weeks |
| 20 | ~7 weeks | ~14 weeks |
But meeting a word is not the same as keeping it. Learn 20 a day with no review and most leak straight back out. That is where spaced repetition turns the table above from a fantasy into a plan: it holds each word in memory by bringing it back right before you'd forget, so the count you reach is the count you keep.
The takeaway
Don't aim for a dictionary. Aim for the frequent core first, meet those words in real Swedish you enjoy reading, and let a scheduler stop them from leaking away. A few new words a day, kept for good, compounds into real comprehension in a couple of months, not years.