83626966 ÷ 689 
The aim is to understand the frequency of 689 in 83626966.

Step 1:
When dividing 8 by 689, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 689

Let's proceed to step 2:
83 divided by 689 is 0 with a remainder of 83.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 83, we get 83.
Bring next digit (6) of the dividend behind the 83 and repeat the process: 836 / 689

On to step 3:
689 goes into 836 1 times with a remainder of 147.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 689 from 836 and we're left with 147.
Append the next digit (2) from the dividend to 147 and continue with: 1472 / 689

Moving on to step 4:
689 goes into 1472 2 times with a remainder of 94.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 1378 from 1472 and we're left with 94.
Fetch the next digit (6) from the dividend, attach it to 94 and continue: 946 / 689

Let's proceed to step 5:
When dividing 946 by 689, we get 1 with a remainder of 257.
Write down 1 as next digit of the result. 
Result so far: 121.0
The remainder is 257 after subtracting 689 from 946.
Append the next digit (9) from the dividend to 257 and continue with: 2579 / 689

Advancing to step 6:
2579 divided by 689 is 3 with a remainder of 512.
Use 3 as the next digit of our solution. 
Result so far: 1213.0
Subtracting 2067 from 2579 leaves us with 512.
Append the next digit (6) from the dividend to 512 and continue with: 5126 / 689

Advancing to step 7:
If we divide 5126 by 689, we get 7 and a remainder of 303.
Record the quotient 7 as the next digit in the result. 
Result so far: 12137.0
If we subtract 4823 from 5126, we get 303.
Append the next digit (6) from the dividend to 303 and continue with: 3036 / 689

Going ahead to step 8:
If we divide 3036 by 689, we get 4 and a remainder of 280.
Write down 4 as next digit of the result. 
Result so far: 121374.0
Deduct 2756 from 3036 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Let's proceed to step 9:
If we divide 2800 by 689, we get 4 and a remainder of 44.
Use 4 as the next digit of our solution. 
Result so far: 121374.4
If we take 2756 away from 2800, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 10:
689 goes into 440 0 times with a remainder of 440.
Write down 0 as next digit of the result. 
Result so far: 121374.4
Deduct 0 from 440 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 11:
689 goes into 4400 6 times with a remainder of 266.
The next digit of our result is 6. 
Result so far: 121374.406
If we subtract 4134 from 4400, we get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Let's proceed to step 12:
2660 divided by 689 is 3 with a remainder of 593.
The number 3 becomes the next digit in our result. 
Result so far: 121374.4063
Subtracting 2067 from 2660 leaves us with 593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5930, and continue the process.

Let's proceed to step 13:
5930 divided by 689 is 8 with a remainder of 418.
The number 8 becomes the next digit in our result. 
Result so far: 121374.40638
The remainder is 418 after subtracting 5512 from 5930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

On to step 14:
4180 divided by 689 is 6 with a remainder of 46.
Put 6 as the next digit of the answer. 
Result so far: 121374.406386
Subtract 4134 from 4180 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 15:
689 can be fit into 460 0 times, resulting in a remainder of 460.
The number 0 becomes the next digit in our result. 
Result so far: 121374.406386
If we take 0 away from 460, we end up with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 16:
689 can be fit into 4600 6 times, resulting in a remainder of 466.
The number 6 becomes the next digit in our result. 
Result so far: 121374.40638606
Subtract 4134 from 4600 to get 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

The final outcome is 121374.40638606, with a leftover of 4.66e-07.