90979940 ÷ 139 
The aim is to understand the frequency of 139 in 90979940.

Moving on to step 1:
When dividing 9 by 139, 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.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 139

Moving on to step 2:
If we divide 90 by 139, we get 0 and a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Append the next digit (9) from the dividend to 90 and continue with: 909 / 139

Going ahead to step 3:
The number 139 fits into 909 6 times, leaving a remainder of 75.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtract 834 from 909 to get 75.
Grab the next digit (7) from the dividend, add it to 75, then carry on: 757 / 139

Advancing to step 4:
The number 139 fits into 757 5 times, leaving a remainder of 62.
Write down 5 as next digit of the result. 
Result so far: 65.0
Subtract 695 from 757 to get 62.
Fetch the next digit (9) from the dividend, attach it to 62 and continue: 629 / 139

Let's proceed to step 5:
139 goes into 629 4 times with a remainder of 73.
Write down 4 as next digit of the result. 
Result so far: 654.0
The remainder is 73 after subtracting 556 from 629.
Fetch the next digit (9) from the dividend, attach it to 73 and continue: 739 / 139

Step 6:
The number 139 fits into 739 5 times, leaving a remainder of 44.
Put 5 as the next digit of the answer. 
Result so far: 6545.0
Deduct 695 from 739 and we're left with 44.
Take the next digit (4) from the dividend and append it to 44, then repeat: 444 / 139

Going ahead to step 7:
139 can be fit into 444 3 times, resulting in a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 65453.0
Subtract 417 from 444 to get 27.
Bring next digit (0) of the dividend behind the 27 and repeat the process: 270 / 139

Let's proceed to step 8:
139 goes into 270 1 times with a remainder of 131.
Put 1 as the next digit of the answer. 
Result so far: 654531.0
If we take 139 away from 270, we end up with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Moving on to step 9:
When dividing 1310 by 139, we get 9 with a remainder of 59.
Use 9 as the next digit of our solution. 
Result so far: 654531.9
If we subtract 1251 from 1310, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 10:
If we divide 590 by 139, we get 4 and a remainder of 34.
Write down 4 as next digit of the result. 
Result so far: 654531.94
If we take 556 away from 590, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 11:
139 goes into 340 2 times with a remainder of 62.
Put 2 as the next digit of the answer. 
Result so far: 654531.942
Deduct 278 from 340 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 12:
139 can be fit into 620 4 times, resulting in a remainder of 64.
The number 4 becomes the next digit in our result. 
Result so far: 654531.9424
If we subtract 556 from 620, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 13:
640 divided by 139 is 4 with a remainder of 84.
The next digit of our result is 4. 
Result so far: 654531.94244
Subtract 556 from 640 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Our division results in 654531.94244 with a remaining 8.4e-05.