42712167 ÷ 621 
The aim is to understand the frequency of 621 in 42712167.

Going ahead to step 1:
4 divided by 621 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 621

Advancing to step 2:
When dividing 42 by 621, we get 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Grab the next digit (7) from the dividend, add it to 42, then carry on: 427 / 621

On to step 3:
If we divide 427 by 621, we get 0 and a remainder of 427.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 427 leaves us with 427.
Include the next digit (1) from the dividend after 427, then repeat: 4271 / 621

Let's proceed to step 4:
If we divide 4271 by 621, we get 6 and a remainder of 545.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 3726 from 4271 to get 545.
Append the next digit (2) from the dividend to 545 and continue with: 5452 / 621

Let's proceed to step 5:
621 goes into 5452 8 times with a remainder of 484.
Use 8 as the next digit of our solution. 
Result so far: 68.0
Subtract 4968 from 5452 to get 484.
Grab the next digit (1) from the dividend, add it to 484, then carry on: 4841 / 621

Step 6:
If we divide 4841 by 621, we get 7 and a remainder of 494.
Record the quotient 7 as the next digit in the result. 
Result so far: 687.0
If we take 4347 away from 4841, we end up with 494.
Append the next digit (6) from the dividend to 494 and continue with: 4946 / 621

Going ahead to step 7:
When dividing 4946 by 621, we get 7 with a remainder of 599.
Record the quotient 7 as the next digit in the result. 
Result so far: 6877.0
Deduct 4347 from 4946 and we're left with 599.
Take the next digit (7) from the dividend and append it to 599, then repeat: 5997 / 621

On to step 8:
621 goes into 5997 9 times with a remainder of 408.
Put 9 as the next digit of the answer. 
Result so far: 68779.0
If we take 5589 away from 5997, we end up with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Let's proceed to step 9:
The number 621 fits into 4080 6 times, leaving a remainder of 354.
The number 6 becomes the next digit in our result. 
Result so far: 68779.6
Subtract 3726 from 4080 to get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Going ahead to step 10:
621 can be fit into 3540 5 times, resulting in a remainder of 435.
The next digit of our result is 5. 
Result so far: 68779.65
Subtract 3105 from 3540 to get 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

On to step 11:
4350 divided by 621 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 68779.657
Subtract 4347 from 4350 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 12:
621 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 68779.657
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 13:
When dividing 300 by 621, we get 0 with a remainder of 300.
Use 0 as the next digit of our solution. 
Result so far: 68779.657
Subtracting 0 from 300 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Our division results in 68779.657 with a remaining 0.0003.