61861424 divided by 621 
The aim is to understand the frequency of 621 in 61861424.

Advancing to step 1:
If we divide 6 by 621, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 621

On to step 2:
621 can be fit into 61 0 times, resulting in a remainder of 61.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 61 leaves us with 61.
Append the next digit (8) from the dividend to 61 and continue with: 618 / 621

Step 3:
621 can be fit into 618 0 times, resulting in a remainder of 618.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 618, we end up with 618.
Include the next digit (6) from the dividend after 618, then repeat: 6186 / 621

Going ahead to step 4:
621 goes into 6186 9 times with a remainder of 597.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we subtract 5589 from 6186, we get 597.
Take the next digit (1) from the dividend and append it to 597, then repeat: 5971 / 621

Moving on to step 5:
When dividing 5971 by 621, we get 9 with a remainder of 382.
The next digit of our result is 9. 
Result so far: 99.0
Subtracting 5589 from 5971 leaves us with 382.
Grab the next digit (4) from the dividend, add it to 382, then carry on: 3824 / 621

Step 6:
621 goes into 3824 6 times with a remainder of 98.
Put 6 as the next digit of the answer. 
Result so far: 996.0
Subtract 3726 from 3824 to get 98.
Fetch the next digit (2) from the dividend, attach it to 98 and continue: 982 / 621

Let's proceed to step 7:
621 goes into 982 1 times with a remainder of 361.
The number 1 becomes the next digit in our result. 
Result so far: 9961.0
The remainder is 361 after subtracting 621 from 982.
Bring next digit (4) of the dividend behind the 361 and repeat the process: 3614 / 621

Moving on to step 8:
When dividing 3614 by 621, we get 5 with a remainder of 509.
The next digit of our result is 5. 
Result so far: 99615.0
If we take 3105 away from 3614, we end up with 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Going ahead to step 9:
621 can be fit into 5090 8 times, resulting in a remainder of 122.
The number 8 becomes the next digit in our result. 
Result so far: 99615.8
The remainder is 122 after subtracting 4968 from 5090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Advancing to step 10:
The number 621 fits into 1220 1 times, leaving a remainder of 599.
The next digit of our result is 1. 
Result so far: 99615.81
The remainder is 599 after subtracting 621 from 1220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5990, and continue the process.

Let's proceed to step 11:
621 can be fit into 5990 9 times, resulting in a remainder of 401.
Write down 9 as next digit of the result. 
Result so far: 99615.819
Deduct 5589 from 5990 and we're left with 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

On to step 12:
4010 divided by 621 is 6 with a remainder of 284.
Put 6 as the next digit of the answer. 
Result so far: 99615.8196
If we subtract 3726 from 4010, we get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Moving on to step 13:
621 can be fit into 2840 4 times, resulting in a remainder of 356.
Record the quotient 4 as the next digit in the result. 
Result so far: 99615.81964
If we take 2484 away from 2840, we end up with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Step 14:
When dividing 3560 by 621, we get 5 with a remainder of 455.
Write down 5 as next digit of the result. 
Result so far: 99615.819645
Subtract 3105 from 3560 to get 455.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4550, and continue the process.

Moving on to step 15:
621 can be fit into 4550 7 times, resulting in a remainder of 203.
Write down 7 as next digit of the result. 
Result so far: 99615.8196457
Subtracting 4347 from 4550 leaves us with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Moving on to step 16:
If we divide 2030 by 621, we get 3 and a remainder of 167.
Record the quotient 3 as the next digit in the result. 
Result so far: 99615.81964573
Subtracting 1863 from 2030 leaves us with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

The final result is 99615.81964573 with a remainder of 1.67e-07.