We're dividing 83546685 by 620 
The aim is to understand the frequency of 620 in 83546685.

On to step 1:
8 divided by 620 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 620

On to step 2:
If we divide 83 by 620, we get 0 and a remainder of 83.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Include the next digit (5) from the dividend after 83, then repeat: 835 / 620

On to step 3:
If we divide 835 by 620, we get 1 and a remainder of 215.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 620 from 835 and we're left with 215.
Append the next digit (4) from the dividend to 215 and continue with: 2154 / 620

Let's proceed to step 4:
620 goes into 2154 3 times with a remainder of 294.
Write down 3 as next digit of the result. 
Result so far: 13.0
Subtracting 1860 from 2154 leaves us with 294.
Include the next digit (6) from the dividend after 294, then repeat: 2946 / 620

Step 5:
If we divide 2946 by 620, we get 4 and a remainder of 466.
The number 4 becomes the next digit in our result. 
Result so far: 134.0
The remainder is 466 after subtracting 2480 from 2946.
Include the next digit (6) from the dividend after 466, then repeat: 4666 / 620

Going ahead to step 6:
4666 divided by 620 is 7 with a remainder of 326.
Write down 7 as next digit of the result. 
Result so far: 1347.0
Subtract 4340 from 4666 to get 326.
Include the next digit (8) from the dividend after 326, then repeat: 3268 / 620

Advancing to step 7:
The number 620 fits into 3268 5 times, leaving a remainder of 168.
The next digit of our result is 5. 
Result so far: 13475.0
Subtracting 3100 from 3268 leaves us with 168.
Append the next digit (5) from the dividend to 168 and continue with: 1685 / 620

Step 8:
When dividing 1685 by 620, we get 2 with a remainder of 445.
The next digit of our result is 2. 
Result so far: 134752.0
If we take 1240 away from 1685, we end up with 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Moving on to step 9:
The number 620 fits into 4450 7 times, leaving a remainder of 110.
Record the quotient 7 as the next digit in the result. 
Result so far: 134752.7
If we take 4340 away from 4450, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 10:
620 goes into 1100 1 times with a remainder of 480.
The next digit of our result is 1. 
Result so far: 134752.71
If we take 620 away from 1100, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Step 11:
620 goes into 4800 7 times with a remainder of 460.
Put 7 as the next digit of the answer. 
Result so far: 134752.717
Deduct 4340 from 4800 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Let's proceed to step 12:
620 can be fit into 4600 7 times, resulting in a remainder of 260.
Put 7 as the next digit of the answer. 
Result so far: 134752.7177
Subtract 4340 from 4600 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

The final result is 134752.7177 with a remainder of 0.0026.