83545538 ÷ 690 
The aim is to understand the frequency of 690 in 83545538.

Let's proceed to step 1:
690 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 690

Let's proceed to step 2:
690 can be fit into 83 0 times, resulting in a remainder of 83.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 83 leaves us with 83.
Fetch the next digit (5) from the dividend, attach it to 83 and continue: 835 / 690

Let's proceed to step 3:
690 can be fit into 835 1 times, resulting in a remainder of 145.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 690 away from 835, we end up with 145.
Include the next digit (4) from the dividend after 145, then repeat: 1454 / 690

Step 4:
When dividing 1454 by 690, we get 2 with a remainder of 74.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we take 1380 away from 1454, we end up with 74.
Include the next digit (5) from the dividend after 74, then repeat: 745 / 690

Step 5:
690 can be fit into 745 1 times, resulting in a remainder of 55.
Use 1 as the next digit of our solution. 
Result so far: 121.0
Subtracting 690 from 745 leaves us with 55.
Fetch the next digit (5) from the dividend, attach it to 55 and continue: 555 / 690

Step 6:
690 goes into 555 0 times with a remainder of 555.
The next digit of our result is 0. 
Result so far: 1210.0
Deduct 0 from 555 and we're left with 555.
Append the next digit (3) from the dividend to 555 and continue with: 5553 / 690

Let's proceed to step 7:
When dividing 5553 by 690, we get 8 with a remainder of 33.
Record the quotient 8 as the next digit in the result. 
Result so far: 12108.0
Deduct 5520 from 5553 and we're left with 33.
Append the next digit (8) from the dividend to 33 and continue with: 338 / 690

Advancing to step 8:
If we divide 338 by 690, we get 0 and a remainder of 338.
Record the quotient 0 as the next digit in the result. 
Result so far: 121080.0
If we subtract 0 from 338, we get 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

On to step 9:
If we divide 3380 by 690, we get 4 and a remainder of 620.
Put 4 as the next digit of the answer. 
Result so far: 121080.4
If we subtract 2760 from 3380, we get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Advancing to step 10:
The number 690 fits into 6200 8 times, leaving a remainder of 680.
The next digit of our result is 8. 
Result so far: 121080.48
The remainder is 680 after subtracting 5520 from 6200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Let's proceed to step 11:
If we divide 6800 by 690, we get 9 and a remainder of 590.
Record the quotient 9 as the next digit in the result. 
Result so far: 121080.489
Subtract 6210 from 6800 to get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Going ahead to step 12:
690 goes into 5900 8 times with a remainder of 380.
The next digit of our result is 8. 
Result so far: 121080.4898
If we take 5520 away from 5900, we end up 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.

Step 13:
3800 divided by 690 is 5 with a remainder of 350.
The next digit of our result is 5. 
Result so far: 121080.48985
If we subtract 3450 from 3800, we get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Moving on to step 14:
690 goes into 3500 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 121080.489855
If we subtract 3450 from 3500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 121080.489855 with a remainder of 5e-06.