61965189 ÷ 839 
The aim is to understand the frequency of 839 in 61965189.

Advancing to step 1:
839 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 839

On to step 2:
The number 839 fits into 61 0 times, leaving a remainder of 61.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 61 after subtracting 0 from 61.
Grab the next digit (9) from the dividend, add it to 61, then carry on: 619 / 839

Let's proceed to step 3:
The number 839 fits into 619 0 times, leaving a remainder of 619.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 619, we get 619.
Take the next digit (6) from the dividend and append it to 619, then repeat: 6196 / 839

Step 4:
If we divide 6196 by 839, we get 7 and a remainder of 323.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 5873 from 6196 and we're left with 323.
Take the next digit (5) from the dividend and append it to 323, then repeat: 3235 / 839

On to step 5:
3235 divided by 839 is 3 with a remainder of 718.
Write down 3 as next digit of the result. 
Result so far: 73.0
If we subtract 2517 from 3235, we get 718.
Take the next digit (1) from the dividend and append it to 718, then repeat: 7181 / 839

On to step 6:
The number 839 fits into 7181 8 times, leaving a remainder of 469.
The number 8 becomes the next digit in our result. 
Result so far: 738.0
Subtract 6712 from 7181 to get 469.
Bring next digit (8) of the dividend behind the 469 and repeat the process: 4698 / 839

Step 7:
If we divide 4698 by 839, we get 5 and a remainder of 503.
Record the quotient 5 as the next digit in the result. 
Result so far: 7385.0
If we subtract 4195 from 4698, we get 503.
Include the next digit (9) from the dividend after 503, then repeat: 5039 / 839

Advancing to step 8:
839 can be fit into 5039 6 times, resulting in a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 73856.0
The remainder is 5 after subtracting 5034 from 5039.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 9:
If we divide 50 by 839, we get 0 and a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 73856.0
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
The number 839 fits into 500 0 times, leaving a remainder of 500.
Put 0 as the next digit of the answer. 
Result so far: 73856.0
The remainder is 500 after subtracting 0 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

After the division, we end up with 73856.0 and a remainder of 0.5.