We look at the division of 63428887 by 620 
The aim is to understand the frequency of 620 in 63428887.

Going ahead to step 1:
The number 620 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 620

Advancing to step 2:
63 divided by 620 is 0 with a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Include the next digit (4) from the dividend after 63, then repeat: 634 / 620

Step 3:
620 can be fit into 634 1 times, resulting in a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 620 from 634, we get 14.
Fetch the next digit (2) from the dividend, attach it to 14 and continue: 142 / 620

Step 4:
142 divided by 620 is 0 with a remainder of 142.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 142 after subtracting 0 from 142.
Include the next digit (8) from the dividend after 142, then repeat: 1428 / 620

Advancing to step 5:
1428 divided by 620 is 2 with a remainder of 188.
Put 2 as the next digit of the answer. 
Result so far: 102.0
Deduct 1240 from 1428 and we're left with 188.
Append the next digit (8) from the dividend to 188 and continue with: 1888 / 620

Going ahead to step 6:
1888 divided by 620 is 3 with a remainder of 28.
The number 3 becomes the next digit in our result. 
Result so far: 1023.0
Subtracting 1860 from 1888 leaves us with 28.
Fetch the next digit (8) from the dividend, attach it to 28 and continue: 288 / 620

Step 7:
288 divided by 620 is 0 with a remainder of 288.
Write down 0 as next digit of the result. 
Result so far: 10230.0
Deduct 0 from 288 and we're left with 288.
Include the next digit (7) from the dividend after 288, then repeat: 2887 / 620

Moving on to step 8:
620 can be fit into 2887 4 times, resulting in a remainder of 407.
Record the quotient 4 as the next digit in the result. 
Result so far: 102304.0
If we take 2480 away from 2887, we end up with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Moving on to step 9:
4070 divided by 620 is 6 with a remainder of 350.
Write down 6 as next digit of the result. 
Result so far: 102304.6
If we take 3720 away from 4070, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Let's proceed to step 10:
620 can be fit into 3500 5 times, resulting in a remainder of 400.
Use 5 as the next digit of our solution. 
Result so far: 102304.65
Subtract 3100 from 3500 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Moving on to step 11:
The number 620 fits into 4000 6 times, leaving a remainder of 280.
The next digit of our result is 6. 
Result so far: 102304.656
Subtract 3720 from 4000 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 12:
2800 divided by 620 is 4 with a remainder of 320.
The number 4 becomes the next digit in our result. 
Result so far: 102304.6564
Subtract 2480 from 2800 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 13:
If we divide 3200 by 620, we get 5 and a remainder of 100.
The next digit of our result is 5. 
Result so far: 102304.65645
Subtract 3100 from 3200 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 14:
If we divide 1000 by 620, we get 1 and a remainder of 380.
Write down 1 as next digit of the result. 
Result so far: 102304.656451
Subtracting 620 from 1000 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

On to step 15:
When dividing 3800 by 620, we get 6 with a remainder of 80.
The number 6 becomes the next digit in our result. 
Result so far: 102304.6564516
Subtract 3720 from 3800 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 16:
800 divided by 620 is 1 with a remainder of 180.
The next digit of our result is 1. 
Result so far: 102304.65645161
The remainder is 180 after subtracting 620 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

After the division, we end up with 102304.65645161 and a remainder of 1.8e-07.