We look at the division of 67831680 by 670 
The aim is to understand the frequency of 670 in 67831680.

Going ahead to step 1:
If we divide 6 by 670, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (7) from the dividend after 6, then repeat: 67 / 670

On to step 2:
670 goes into 67 0 times with a remainder of 67.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 67 to get 67.
Grab the next digit (8) from the dividend, add it to 67, then carry on: 678 / 670

Step 3:
If we divide 678 by 670, we get 1 and a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 670 away from 678, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 670

Step 4:
83 divided by 670 is 0 with a remainder of 83.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 83 after subtracting 0 from 83.
Append the next digit (1) from the dividend to 83 and continue with: 831 / 670

Advancing to step 5:
When dividing 831 by 670, we get 1 with a remainder of 161.
Put 1 as the next digit of the answer. 
Result so far: 101.0
If we subtract 670 from 831, we get 161.
Grab the next digit (6) from the dividend, add it to 161, then carry on: 1616 / 670

Moving on to step 6:
670 goes into 1616 2 times with a remainder of 276.
Use 2 as the next digit of our solution. 
Result so far: 1012.0
Deduct 1340 from 1616 and we're left with 276.
Fetch the next digit (8) from the dividend, attach it to 276 and continue: 2768 / 670

On to step 7:
If we divide 2768 by 670, we get 4 and a remainder of 88.
Put 4 as the next digit of the answer. 
Result so far: 10124.0
Subtract 2680 from 2768 to get 88.
Bring next digit (0) of the dividend behind the 88 and repeat the process: 880 / 670

On to step 8:
If we divide 880 by 670, we get 1 and a remainder of 210.
Record the quotient 1 as the next digit in the result. 
Result so far: 101241.0
If we take 670 away from 880, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Step 9:
2100 divided by 670 is 3 with a remainder of 90.
Use 3 as the next digit of our solution. 
Result so far: 101241.3
The remainder is 90 after subtracting 2010 from 2100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 10:
900 divided by 670 is 1 with a remainder of 230.
The number 1 becomes the next digit in our result. 
Result so far: 101241.31
Subtracting 670 from 900 leaves us with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Going ahead to step 11:
670 can be fit into 2300 3 times, resulting in a remainder of 290.
The next digit of our result is 3. 
Result so far: 101241.313
The remainder is 290 after subtracting 2010 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Advancing to step 12:
If we divide 2900 by 670, we get 4 and a remainder of 220.
Write down 4 as next digit of the result. 
Result so far: 101241.3134
The remainder is 220 after subtracting 2680 from 2900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 13:
If we divide 2200 by 670, we get 3 and a remainder of 190.
Record the quotient 3 as the next digit in the result. 
Result so far: 101241.31343
If we subtract 2010 from 2200, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Advancing to step 14:
670 can be fit into 1900 2 times, resulting in a remainder of 560.
The number 2 becomes the next digit in our result. 
Result so far: 101241.313432
Deduct 1340 from 1900 and we're left with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 15:
If we divide 5600 by 670, we get 8 and a remainder of 240.
Put 8 as the next digit of the answer. 
Result so far: 101241.3134328
If we take 5360 away from 5600, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 16:
The number 670 fits into 2400 3 times, leaving a remainder of 390.
The next digit of our result is 3. 
Result so far: 101241.31343283
If we take 2010 away from 2400, we end up with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

The final result is 101241.31343283 with a remainder of 3.9e-07.