19385660 divided by 621 
The aim is to understand the frequency of 621 in 19385660.

Let's proceed to step 1:
When dividing 1 by 621, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 621

Step 2:
The number 621 fits into 19 0 times, leaving a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 19 and we're left with 19.
Fetch the next digit (3) from the dividend, attach it to 19 and continue: 193 / 621

Moving on to step 3:
The number 621 fits into 193 0 times, leaving a remainder of 193.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 193 leaves us with 193.
Grab the next digit (8) from the dividend, add it to 193, then carry on: 1938 / 621

Advancing to step 4:
If we divide 1938 by 621, we get 3 and a remainder of 75.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 75 after subtracting 1863 from 1938.
Append the next digit (5) from the dividend to 75 and continue with: 755 / 621

Step 5:
If we divide 755 by 621, we get 1 and a remainder of 134.
Put 1 as the next digit of the answer. 
Result so far: 31.0
If we subtract 621 from 755, we get 134.
Append the next digit (6) from the dividend to 134 and continue with: 1346 / 621

Step 6:
If we divide 1346 by 621, we get 2 and a remainder of 104.
The next digit of our result is 2. 
Result so far: 312.0
If we subtract 1242 from 1346, we get 104.
Take the next digit (6) from the dividend and append it to 104, then repeat: 1046 / 621

Going ahead to step 7:
When dividing 1046 by 621, we get 1 with a remainder of 425.
The next digit of our result is 1. 
Result so far: 3121.0
If we take 621 away from 1046, we end up with 425.
Take the next digit (0) from the dividend and append it to 425, then repeat: 4250 / 621

Going ahead to step 8:
621 can be fit into 4250 6 times, resulting in a remainder of 524.
The next digit of our result is 6. 
Result so far: 31216.0
If we subtract 3726 from 4250, we get 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

Let's proceed to step 9:
When dividing 5240 by 621, we get 8 with a remainder of 272.
Record the quotient 8 as the next digit in the result. 
Result so far: 31216.8
If we take 4968 away from 5240, we end up with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Moving on to step 10:
If we divide 2720 by 621, we get 4 and a remainder of 236.
The next digit of our result is 4. 
Result so far: 31216.84
Subtracting 2484 from 2720 leaves us with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

On to step 11:
2360 divided by 621 is 3 with a remainder of 497.
Put 3 as the next digit of the answer. 
Result so far: 31216.843
If we subtract 1863 from 2360, we get 497.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4970, and continue the process.

Going ahead to step 12:
4970 divided by 621 is 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 31216.8438
Subtract 4968 from 4970 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 13:
If we divide 20 by 621, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 31216.8438
If we take 0 away from 20, we end up 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 14:
If we divide 200 by 621, we get 0 and a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 31216.8438
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The quotient of the division is 31216.8438, and the remainder is 2e-05.