We look at the division of 90035258 by 620 
The aim is to understand the frequency of 620 in 90035258.

Let's proceed to step 1:
620 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 620

Going ahead to step 2:
620 can be fit into 90 0 times, resulting in a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Include the next digit (0) from the dividend after 90, then repeat: 900 / 620

Let's proceed to step 3:
The number 620 fits into 900 1 times, leaving a remainder of 280.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 620 from 900 and we're left with 280.
Include the next digit (3) from the dividend after 280, then repeat: 2803 / 620

Step 4:
620 can be fit into 2803 4 times, resulting in a remainder of 323.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 323 after subtracting 2480 from 2803.
Include the next digit (5) from the dividend after 323, then repeat: 3235 / 620

Going ahead to step 5:
If we divide 3235 by 620, we get 5 and a remainder of 135.
Put 5 as the next digit of the answer. 
Result so far: 145.0
Subtracting 3100 from 3235 leaves us with 135.
Grab the next digit (2) from the dividend, add it to 135, then carry on: 1352 / 620

On to step 6:
If we divide 1352 by 620, we get 2 and a remainder of 112.
The next digit of our result is 2. 
Result so far: 1452.0
If we take 1240 away from 1352, we end up with 112.
Bring next digit (5) of the dividend behind the 112 and repeat the process: 1125 / 620

Going ahead to step 7:
1125 divided by 620 is 1 with a remainder of 505.
Put 1 as the next digit of the answer. 
Result so far: 14521.0
The remainder is 505 after subtracting 620 from 1125.
Include the next digit (8) from the dividend after 505, then repeat: 5058 / 620

Moving on to step 8:
620 can be fit into 5058 8 times, resulting in a remainder of 98.
The next digit of our result is 8. 
Result so far: 145218.0
The remainder is 98 after subtracting 4960 from 5058.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 9:
The number 620 fits into 980 1 times, leaving a remainder of 360.
The next digit of our result is 1. 
Result so far: 145218.1
If we subtract 620 from 980, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 10:
620 goes into 3600 5 times with a remainder of 500.
Use 5 as the next digit of our solution. 
Result so far: 145218.15
Subtract 3100 from 3600 to get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 11:
620 can be fit into 5000 8 times, resulting in a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 145218.158
If we subtract 4960 from 5000, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 12:
620 goes into 400 0 times with a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 145218.158
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 13:
620 can be fit into 4000 6 times, resulting in a remainder of 280.
The number 6 becomes the next digit in our result. 
Result so far: 145218.15806
The remainder is 280 after subtracting 3720 from 4000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 14:
When dividing 2800 by 620, we get 4 with a remainder of 320.
Use 4 as the next digit of our solution. 
Result so far: 145218.158064
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 15:
620 can be fit into 3200 5 times, resulting in a remainder of 100.
The number 5 becomes the next digit in our result. 
Result so far: 145218.1580645
If we subtract 3100 from 3200, we 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.

Moving on to step 16:
When dividing 1000 by 620, we get 1 with a remainder of 380.
Put 1 as the next digit of the answer. 
Result so far: 145218.15806451
Deduct 620 from 1000 and we're left 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.

The final outcome is 145218.15806451, with a leftover of 3.8e-07.