Let's divide 67391473 by 210
The aim is to understand the frequency of 210 in 67391473.

Step 1:
6 divided by 210 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (7) from the dividend, add it to 6, then carry on: 67 / 210

Advancing to step 2:
When dividing 67 by 210, we get 0 with a remainder of 67.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 67 after subtracting 0 from 67.
Take the next digit (3) from the dividend and append it to 67, then repeat: 673 / 210

On to step 3:
210 goes into 673 3 times with a remainder of 43.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 630 away from 673, we end up with 43.
Fetch the next digit (9) from the dividend, attach it to 43 and continue: 439 / 210

On to step 4:
The number 210 fits into 439 2 times, leaving a remainder of 19.
Use 2 as the next digit of our solution. 
Result so far: 32.0
The remainder is 19 after subtracting 420 from 439.
Take the next digit (1) from the dividend and append it to 19, then repeat: 191 / 210

Advancing to step 5:
210 can be fit into 191 0 times, resulting in a remainder of 191.
Record the quotient 0 as the next digit in the result. 
Result so far: 320.0
If we take 0 away from 191, we end up with 191.
Take the next digit (4) from the dividend and append it to 191, then repeat: 1914 / 210

Advancing to step 6:
210 goes into 1914 9 times with a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 3209.0
If we take 1890 away from 1914, we end up with 24.
Fetch the next digit (7) from the dividend, attach it to 24 and continue: 247 / 210

Going ahead to step 7:
247 divided by 210 is 1 with a remainder of 37.
Write down 1 as next digit of the result. 
Result so far: 32091.0
If we subtract 210 from 247, we get 37.
Bring next digit (3) of the dividend behind the 37 and repeat the process: 373 / 210

On to step 8:
210 goes into 373 1 times with a remainder of 163.
Put 1 as the next digit of the answer. 
Result so far: 320911.0
If we take 210 away from 373, we end up with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Advancing to step 9:
210 goes into 1630 7 times with a remainder of 160.
Put 7 as the next digit of the answer. 
Result so far: 320911.7
If we take 1470 away from 1630, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 10:
The number 210 fits into 1600 7 times, leaving a remainder of 130.
Put 7 as the next digit of the answer. 
Result so far: 320911.77
Deduct 1470 from 1600 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Our division results in 320911.77 with a remaining 0.13.