We're dividing 98663639 by 379 
The aim is to understand the frequency of 379 in 98663639.

Advancing to step 1:
When dividing 9 by 379, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 379

Going ahead to step 2:
379 can be fit into 98 0 times, resulting in a remainder of 98.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 98 leaves us with 98.
Fetch the next digit (6) from the dividend, attach it to 98 and continue: 986 / 379

Moving on to step 3:
The number 379 fits into 986 2 times, leaving a remainder of 228.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 228 after subtracting 758 from 986.
Bring next digit (6) of the dividend behind the 228 and repeat the process: 2286 / 379

Moving on to step 4:
If we divide 2286 by 379, we get 6 and a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 26.0
Deduct 2274 from 2286 and we're left with 12.
Bring next digit (3) of the dividend behind the 12 and repeat the process: 123 / 379

Step 5:
379 goes into 123 0 times with a remainder of 123.
Put 0 as the next digit of the answer. 
Result so far: 260.0
The remainder is 123 after subtracting 0 from 123.
Grab the next digit (6) from the dividend, add it to 123, then carry on: 1236 / 379

Going ahead to step 6:
If we divide 1236 by 379, we get 3 and a remainder of 99.
Write down 3 as next digit of the result. 
Result so far: 2603.0
If we subtract 1137 from 1236, we get 99.
Fetch the next digit (3) from the dividend, attach it to 99 and continue: 993 / 379

Advancing to step 7:
The number 379 fits into 993 2 times, leaving a remainder of 235.
Use 2 as the next digit of our solution. 
Result so far: 26032.0
Subtract 758 from 993 to get 235.
Fetch the next digit (9) from the dividend, attach it to 235 and continue: 2359 / 379

Going ahead to step 8:
The number 379 fits into 2359 6 times, leaving a remainder of 85.
The number 6 becomes the next digit in our result. 
Result so far: 260326.0
Subtracting 2274 from 2359 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 9:
850 divided by 379 is 2 with a remainder of 92.
Record the quotient 2 as the next digit in the result. 
Result so far: 260326.2
Subtract 758 from 850 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 10:
379 goes into 920 2 times with a remainder of 162.
Use 2 as the next digit of our solution. 
Result so far: 260326.22
The remainder is 162 after subtracting 758 from 920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

The final outcome is 260326.22, with a leftover of 0.162.