We're dividing 21345224 by 790 
The aim is to understand the frequency of 790 in 21345224.

On to step 1:
If we divide 2 by 790, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 790

Moving on to step 2:
If we divide 21 by 790, we get 0 and a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Fetch the next digit (3) from the dividend, attach it to 21 and continue: 213 / 790

Moving on to step 3:
If we divide 213 by 790, we get 0 and a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 213 and we're left with 213.
Bring next digit (4) of the dividend behind the 213 and repeat the process: 2134 / 790

Step 4:
790 goes into 2134 2 times with a remainder of 554.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 1580 from 2134 leaves us with 554.
Bring next digit (5) of the dividend behind the 554 and repeat the process: 5545 / 790

Advancing to step 5:
The number 790 fits into 5545 7 times, leaving a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 27.0
Subtract 5530 from 5545 to get 15.
Include the next digit (2) from the dividend after 15, then repeat: 152 / 790

Let's proceed to step 6:
If we divide 152 by 790, we get 0 and a remainder of 152.
Write down 0 as next digit of the result. 
Result so far: 270.0
The remainder is 152 after subtracting 0 from 152.
Take the next digit (2) from the dividend and append it to 152, then repeat: 1522 / 790

Step 7:
790 can be fit into 1522 1 times, resulting in a remainder of 732.
Put 1 as the next digit of the answer. 
Result so far: 2701.0
Subtract 790 from 1522 to get 732.
Include the next digit (4) from the dividend after 732, then repeat: 7324 / 790

Step 8:
The number 790 fits into 7324 9 times, leaving a remainder of 214.
Record the quotient 9 as the next digit in the result. 
Result so far: 27019.0
If we subtract 7110 from 7324, we get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Advancing to step 9:
When dividing 2140 by 790, we get 2 with a remainder of 560.
Put 2 as the next digit of the answer. 
Result so far: 27019.2
Subtract 1580 from 2140 to get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Advancing to step 10:
If we divide 5600 by 790, we get 7 and a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 27019.27
Deduct 5530 from 5600 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 11:
If we divide 700 by 790, we get 0 and a remainder of 700.
The next digit of our result is 0. 
Result so far: 27019.27
Deduct 0 from 700 and we're left with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Let's proceed to step 12:
790 can be fit into 7000 8 times, resulting in a remainder of 680.
Use 8 as the next digit of our solution. 
Result so far: 27019.2708
If we take 6320 away from 7000, we end up with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

On to step 13:
The number 790 fits into 6800 8 times, leaving a remainder of 480.
Record the quotient 8 as the next digit in the result. 
Result so far: 27019.27088
The remainder is 480 after subtracting 6320 from 6800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

After the division, we end up with 27019.27088 and a remainder of 0.00048.