We look at the division of 43156406 by 680 
The aim is to understand the frequency of 680 in 43156406.

Going ahead to step 1:
When dividing 4 by 680, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 680

Step 2:
680 can be fit into 43 0 times, resulting in a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Fetch the next digit (1) from the dividend, attach it to 43 and continue: 431 / 680

Advancing to step 3:
680 goes into 431 0 times with a remainder of 431.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 431 leaves us with 431.
Include the next digit (5) from the dividend after 431, then repeat: 4315 / 680

Advancing to step 4:
If we divide 4315 by 680, we get 6 and a remainder of 235.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 4080 away from 4315, we end up with 235.
Append the next digit (6) from the dividend to 235 and continue with: 2356 / 680

Going ahead to step 5:
When dividing 2356 by 680, we get 3 with a remainder of 316.
The next digit of our result is 3. 
Result so far: 63.0
Deduct 2040 from 2356 and we're left with 316.
Take the next digit (4) from the dividend and append it to 316, then repeat: 3164 / 680

Step 6:
The number 680 fits into 3164 4 times, leaving a remainder of 444.
Write down 4 as next digit of the result. 
Result so far: 634.0
If we subtract 2720 from 3164, we get 444.
Append the next digit (0) from the dividend to 444 and continue with: 4440 / 680

Going ahead to step 7:
If we divide 4440 by 680, we get 6 and a remainder of 360.
Use 6 as the next digit of our solution. 
Result so far: 6346.0
Deduct 4080 from 4440 and we're left with 360.
Include the next digit (6) from the dividend after 360, then repeat: 3606 / 680

On to step 8:
3606 divided by 680 is 5 with a remainder of 206.
The number 5 becomes the next digit in our result. 
Result so far: 63465.0
If we take 3400 away from 3606, we end up with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Advancing to step 9:
2060 divided by 680 is 3 with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 63465.3
Deduct 2040 from 2060 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
680 goes into 200 0 times with a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 63465.3
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 11:
If we divide 2000 by 680, we get 2 and a remainder of 640.
The next digit of our result is 2. 
Result so far: 63465.302
If we subtract 1360 from 2000, we get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Step 12:
When dividing 6400 by 680, we get 9 with a remainder of 280.
The number 9 becomes the next digit in our result. 
Result so far: 63465.3029
The remainder is 280 after subtracting 6120 from 6400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 13:
If we divide 2800 by 680, we get 4 and a remainder of 80.
The next digit of our result is 4. 
Result so far: 63465.30294
Subtracting 2720 from 2800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 14:
The number 680 fits into 800 1 times, leaving a remainder of 120.
Put 1 as the next digit of the answer. 
Result so far: 63465.302941
If we take 680 away from 800, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 15:
680 can be fit into 1200 1 times, resulting in a remainder of 520.
Use 1 as the next digit of our solution. 
Result so far: 63465.3029411
Subtract 680 from 1200 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

The final outcome is 63465.3029411, with a leftover of 5.2e-06.